{
  "schemaVersion": 4,
  "generated": "2026-10-19",
  "status": "ai-screening-with-rendering-benchmark",
  "researchScope": {
    "mode": "assistant-and-subagent-research",
    "audience": "Broadly familiar symbols for a worldwide audience, with global internet users as a practical reference.",
    "participantRecruitment": false,
    "selectionCriteria": [
      {
        "id": "recognizability",
        "name": "Recognizability, including rendering robustness",
        "priority": "highest",
        "question": "Does the drawing keep its identifying features at small sizes and under rendering changes?",
        "measures": [
          "small-size identification",
          "stroke and hole survival",
          "contrast and backgrounds",
          "pixel density and scaling",
          "compression",
          "drawing variants"
        ],
        "relationship": "Recognizability is the desired identification outcome. Rendering robustness is how the drawing preserves that outcome as conditions change. Evaluate them together without duplicate overall weight."
      },
      {
        "id": "pairwiseDistinctness",
        "name": "Pairwise distinguishability",
        "priority": "core",
        "question": "Can this drawing be distinguished from the other glyphs at the target size?",
        "method": "Raster neighbors followed by AI visual comparison of likely-confusable pairs and the proposed alphabet."
      },
      {
        "id": "memorability",
        "name": "Memorability",
        "priority": "core",
        "question": "Does the shape provide a simple, distinctive mental cue tied to a familiar image or name?",
        "method": "Clearly labeled AI estimates and reasons, including distinctive features and interference from similar symbols; no claim of measured human recall."
      },
      {
        "id": "familiarity",
        "name": "Familiarity",
        "priority": "core",
        "question": "How broadly known is the shape, object or sign?",
        "method": "Existing evidence and AI assessment of broad usage; long history is supporting context rather than proof of universal familiarity."
      },
      {
        "id": "shortNaming",
        "name": "Short naming for voice",
        "priority": "core",
        "question": "How many spoken words are needed to identify the glyph adequately?",
        "method": "Record the selected name and count spoken words, including required direction modifiers. Do not penalize short synonyms merely for existing."
      }
    ],
    "minorConsiderations": [
      "Cultural ambiguity may be recorded as a relevant note; it is not a primary score or gate."
    ],
    "excludedSelectionCriteria": [
      "licensing",
      "drawing-style consistency"
    ],
    "evidenceLabels": [
      "research-supported consideration",
      "assistant estimate",
      "recorded AI visual evaluation",
      "raster diagnostic",
      "word-count rule"
    ],
    "criteriaReview": {
      "reviewers": 2,
      "scope": "AI advisory reviews of the five-category rubric, recognizability/robustness relationship, and naming rules. These were not visual recognition or memory experiments."
    }
  },
  "counts": {
    "concepts": 128,
    "categories": 16,
    "drawings": 136,
    "humanParticipants": 0
  },
  "scope": "128 curated candidate concepts, not a claim that all are universally recognized. Directions, weights and source art do not create additional concepts.",
  "scoreProvenance": "Two independent runs of the same AI model inspected five labeled raster sheets and rated R/D/M/F for all 128 concepts. R combines their mean (60%) with measured machine rendering robustness (40%). D/M/F are the two-rating means; N is the selected English spoken-name word-count score. Memorability and familiarity are AI estimates, not observed recall or population measurements. No per-symbol score is imported from cited papers.",
  "evaluationSummary": {
    "reviewerCount": 2,
    "reviewers": [
      {
        "reviewer": "reviewer-a",
        "model": "gpt-6.1-sol",
        "method": "AI image-based screening with labeled pixel sheets",
        "source": "./assets/symbol-reviewer-a.json"
      },
      {
        "reviewer": "reviewer-b",
        "model": "gpt-6.1-sol",
        "method": "AI image-based screening with labeled pixel sheets",
        "source": "./assets/symbol-reviewer-b.json"
      }
    ],
    "reviewedConcepts": 128,
    "aiCriterionJudgments": 1024,
    "renderingTrials": 24320,
    "canvasSizes": [
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16,
      20,
      24,
      32
    ],
    "conditionCount": 10,
    "stressConditionCount": 8,
    "scoringCanvasSizes": [
      6,
      8,
      10,
      12,
      16,
      20,
      24,
      32
    ],
    "thresholdMethod": "Smallest tested canvas with all8 stress cases uniquely correct at that size and every larger tested size. Percentages are fractions of8 fixed conditions, not human error probabilities.",
    "conditions": [
      {
        "id": "native-control",
        "label": "Native raster control",
        "stress": false
      },
      {
        "id": "phase-plus",
        "label": "Pixel offset +0.35,+0.35",
        "stress": true
      },
      {
        "id": "phase-minus",
        "label": "Pixel offset -0.35,+0.35",
        "stress": true
      },
      {
        "id": "resample-1.5x",
        "label": "Upscale1.5x then downsample",
        "stress": true
      },
      {
        "id": "dpr2-downsample",
        "label": "Render2x then downsample",
        "stress": true
      },
      {
        "id": "jpeg40",
        "label": "JPEG quality40",
        "stress": true
      },
      {
        "id": "jpeg70",
        "label": "JPEG quality70",
        "stress": true
      },
      {
        "id": "blur-0.35",
        "label": "Gaussian blur0.35px",
        "stress": true
      },
      {
        "id": "low-contrast-noise",
        "label": "Low contrast plus deterministic pixel noise",
        "stress": true
      },
      {
        "id": "dark-control",
        "label": "Light ink on dark control",
        "stress": false
      }
    ],
    "sizeWeights": {
      "1": 0,
      "2": 0,
      "3": 0,
      "4": 0,
      "5": 0,
      "6": 2,
      "7": 0,
      "8": 3,
      "9": 0,
      "10": 3,
      "11": 0,
      "12": 2,
      "13": 0,
      "14": 0,
      "15": 0,
      "16": 1.5,
      "20": 1,
      "24": 0.5,
      "32": 0.5
    },
    "recognizabilityFusion": "R = 60% mean AI recognizability + 40% machine robustness score.",
    "otherScores": "Pairwise distinguishability, memorability and familiarity are means of two AI ratings. Short naming follows the spoken-word-count rule.",
    "machineMethod": "Known-template top1 identification by cosine overlap of soft alpha masks against the128 exact native baselines at the same size.",
    "machineScoreRule": "1+4*weighted stress identity accuracy. Native/dark controls excluded from this score. Canvas-size weights emphasize6-12px.",
    "limitations": [
      "This measures a machine matcher with an exact template bank, not semantic or human recognition.",
      "Low-contrast pixels are normalized using known colours; this tests signal retention, not whether low contrast is comfortable to see.",
      "Memorability and familiarity are AI screening estimates elsewhere, not outcomes of this raster experiment.",
      "The reported minimum requires all8 stress conditions at that size and all larger tested sizes; it is a machine floor for this benchmark only.",
      "Each error percentage is a fraction of8 fixed stress cases, including ambiguous ties, not an estimated probability of human confusion.",
      "The ranking robustness score retains the original eight scoring sizes; extra sizes measure the threshold and have zero ranking weight.",
      "Both reviewers inspected labeled sheets. AI ratings are subjective judgments from two independent runs of the same model, not blind recognition, population estimates or measured recall.",
      "The top N is a transparent weighted shortlist, not a jointly optimized or validated alphabet. Confusing pairs should be checked within the chosen set."
    ],
    "significantReviewerDisagreements": [
      {
        "id": "square",
        "criterion": "pairwiseDistinctness",
        "ratings": [
          3,
          5
        ]
      },
      {
        "id": "spider",
        "criterion": "recognizability",
        "ratings": [
          2,
          4
        ]
      },
      {
        "id": "eye",
        "criterion": "pairwiseDistinctness",
        "ratings": [
          3,
          5
        ]
      },
      {
        "id": "truck",
        "criterion": "pairwiseDistinctness",
        "ratings": [
          2,
          4
        ]
      }
    ],
    "sources": {
      "rendering": "./assets/symbol-rendering-results.json",
      "reviewerA": "./assets/symbol-reviewer-a.json",
      "reviewerB": "./assets/symbol-reviewer-b.json"
    }
  },
  "ranking": {
    "defaultWeights": {
      "recognizability": 40,
      "pairwiseDistinctness": 20,
      "memorability": 15,
      "familiarity": 15,
      "shortNaming": 10
    },
    "scale": "20–100 weighted screening score; not a probability or an empirically calibrated measure.",
    "method": "20 × sum(weight × criterion score) / sum(weights). Component scores are on a 1–5 scale. Weights are adjustable in the viewer.",
    "ties": "Higher R, then D, M, F, N, then ascending symbol id. Full precision is used before display rounding.",
    "cutoff": "Top N is determined by the global overall rank across all 128 concepts; filtering or sorting another column does not change membership."
  },
  "rubric": {
    "scale": {
      "1": "poor screening prospect",
      "2": "weak or specialist",
      "3": "mixed; compare alternatives",
      "4": "promising",
      "5": "strong screening prospect"
    },
    "recognizability": "Highest-priority category: 60% mean of two AI small-size recognition judgments plus 40% measured rendering robustness. The machine score is not human recognition or a measured human pixel threshold.",
    "familiarity": "Hypothesized familiarity of the depicted object or sign; not an observed cross-cultural measure.",
    "englishNaming": "Spoken-name length: one word = 5, two = 4, three = 3, more than three = 1. Score 2 is unused. Qualifiers such as right in right arrow count as spoken words. Short synonyms do not lower this score.",
    "shortNaming": "Spoken-name length: one word = 5, two = 4, three = 3, more than three = 1. Required qualifiers count; short synonyms do not reduce the score.",
    "namingPreference": "One word ideal; two good; three less desirable; more than three bad. English names are the current baseline. Names refer to the glyph alone, without adding a colour name.",
    "memorability": "Mean of two independent AI estimates of a simple and distinctive mental cue. Reasons accompany every rating; no claim of measured human recall.",
    "pairwiseDistinctness": "Mean of two AI confusion assessments against the full 128-concept pool. Likely confusions and computed raster neighbors are available for inspecting the chosen subset.",
    "priority": "Legacy inspection queue: test first if all five scores are >=4; compare if all >=3; otherwise inspect alternatives. The table uses overall ranking and an adjustable top-N cutoff.",
    "weighting": "Default R40%, D20%, M15%, F15%, N10%. Rendering robustness contributes within R and receives no separate overall weight. These are project preferences, not scientifically calibrated coefficients."
  },
  "rasterMethod": {
    "engine": "@resvg/resvg-js",
    "version": "2.6.2",
    "sizes": [
      8,
      16,
      32
    ],
    "canvas": "square, transparent background, monochrome alpha",
    "normalization": "Longest ink extent approximately 80% of canvas, measured from a 512-pixel source raster before normalization.",
    "metric": "Cosine similarity of centered alpha masks at the same canvas size. Top three of the other 127 baselines. Higher means more pixel overlap, not a probability of human confusion.",
    "exclusions": "No rotation, scale search, font rasterizer, colour, screen DPR, visual acuity, vocabulary or human response is modeled."
  },
  "categories": [
    {
      "id": "geometry",
      "label": "Geometry and marks"
    },
    {
      "id": "weather",
      "label": "Sky and weather"
    },
    {
      "id": "nature",
      "label": "Plants and landscape"
    },
    {
      "id": "animals",
      "label": "Animals"
    },
    {
      "id": "body",
      "label": "People and body"
    },
    {
      "id": "food",
      "label": "Food ingredients"
    },
    {
      "id": "table",
      "label": "Tableware and prepared food"
    },
    {
      "id": "home",
      "label": "Home and furniture"
    },
    {
      "id": "clothing",
      "label": "Clothing and adornment"
    },
    {
      "id": "tools",
      "label": "Tools and fasteners"
    },
    {
      "id": "transport",
      "label": "Transport"
    },
    {
      "id": "paper",
      "label": "Paper and stationery"
    },
    {
      "id": "technology",
      "label": "Technology and light"
    },
    {
      "id": "everyday",
      "label": "Everyday objects"
    },
    {
      "id": "time-place",
      "label": "Time and navigation"
    },
    {
      "id": "music-play",
      "label": "Music and play"
    }
  ],
  "sources": [
    {
      "id": "iso-comprehension",
      "title": "ISO 9186-1:2014, public description: symbol comprehensibility",
      "url": "https://www.iso.org/standard/59226.html",
      "role": "Separates comprehension testing from drawing inspection; public abstract consulted, no claim of ISO compliance."
    },
    {
      "id": "iso-perception",
      "title": "ISO 9186-2:2008, public description: perceptual quality",
      "url": "https://www.iso.org/obp/ui?_escaped_fragment_=iso%3Astd%3Aiso%3A9186%3A-2%3Aed-1%3Av1%3Aen",
      "role": "Conceptual background for identifying the elements of a symbol and recording viewing conditions; not a requirement for participant testing in this workflow."
    },
    {
      "id": "snodgrass",
      "title": "Snodgrass & Vanderwart (1980), 260-picture norms",
      "url": "https://pubmed.ncbi.nlm.nih.gov/7373248/",
      "role": "Name agreement, familiarity and visual complexity are distinct dimensions; scores not transferred to these drawings."
    },
    {
      "id": "zender",
      "title": "Zender & Cassedy (2014), icon comprehension across cultural contexts",
      "url": "https://journals.uc.edu/index.php/vl/article/view/5880",
      "role": "Evidence against assuming that familiarity with a technology or metaphor is universal; different medical icons and populations from this study."
    },
    {
      "id": "wcag",
      "title": "W3C: Understanding Use of Color",
      "url": "https://www.w3.org/WAI/WCAG22/Understanding/use-of-color.html",
      "role": "Test a visible channel in addition to colour when colours encode information."
    },
    {
      "id": "fontawesome",
      "title": "Font Awesome Free 7.3.1: license and source",
      "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/LICENSE.txt",
      "role": "128 baseline drawings plus source variants. SVG/JS icon art is CC BY 4.0; code license does not relicense the art."
    },
    {
      "id": "material",
      "title": "Google Material Icons: official source and Apache 2.0 license",
      "url": "https://github.com/google/material-design-icons/tree/49d4db35df873165d6bd6ba09b063c7dafbac2f4",
      "role": "Two alternate drawings; vendored at a fixed commit, normalized for comparison."
    }
  ],
  "symbols": [
    {
      "id": "circle",
      "label": "Circle",
      "category": "geometry",
      "naming": {
        "name": "circle",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
      },
      "preliminary": {
        "recognizability": 4.9408,
        "familiarity": 5,
        "englishNaming": 5,
        "pairwiseDistinctness": 2.5,
        "memorability": 3.5,
        "basis": "ai-screening-consensus"
      },
      "note": "Simple silhouette; compare with rounded fruit and clock at tiny sizes.",
      "englishWordCount": 1,
      "priority": "redraw-or-validate",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
        "idealCanvasPx": null,
        "minimumReliableCanvasPx": null,
        "hardCanvasPx": null,
        "notIdentifiableCanvasPx": null,
        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
        "delayedRecall": null
      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(10.00000 10.00000) scale(0.1562500)\"><path d=\"M0 256a256 256 0 1 1 512 0 256 256 0 1 1 -512 0z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "circle",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/circle.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "circle",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "cookie",
            "cosine": 0.9901
          },
          {
            "id": "clock",
            "cosine": 0.9888
          },
          {
            "id": "brain",
            "cosine": 0.9854
          }
        ],
        "nearestAt16px": [
          {
            "id": "cookie",
            "cosine": 0.9844
          },
          {
            "id": "clock",
            "cosine": 0.9793
          },
          {
            "id": "bread",
            "cosine": 0.9577
          }
        ],
        "nearestAt32px": [
          {
            "id": "cookie",
            "cosine": 0.976
          },
          {
            "id": "clock",
            "cosine": 0.9698
          },
          {
            "id": "bread",
            "cosine": 0.9365
          }
        ]
      },
      "priorEstimates": {
        "recognizability": 5,
        "familiarity": 5
      },
      "scores": {
        "recognizability": 4.9408,
        "pairwiseDistinctness": 2.5,
        "memorability": 3.5,
        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 5,
          "pairwiseDistinctness": 2.5,
          "memorability": 3.5,
          "familiarity": 5
        },
        "reviewerRanges": {
          "recognizability": [
            5,
            5
          ],
          "pairwiseDistinctness": [
            2,
            3
          ],
          "memorability": [
            3,
            4
          ],
          "familiarity": [
            5,
            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The filled disk keeps a clean shape; low contrast mainly softens its edge. | reviewer-b: The solid round silhouette survives cleanly. | Machine robustness 4.85/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Cookie and egg approach the same dark dot when their details disappear. | reviewer-b: The tiny egg approaches the same filled oval.",
          "memorability": "reviewer-a: An easy mental outline, though very generic. | reviewer-b: A basic round cue is easy to picture but generic.",
          "familiarity": "reviewer-a: Circles are a basic shape encountered worldwide. | reviewer-b: The circle is a widely learned basic shape.",
          "shortNaming": "“circle” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "cookie",
          "egg"
        ],
        "raster": {
          "id": "circle",
          "bySize": {
            "1": {
              "canvasPx": 1,
              "inkPx": 0.8,
              "correct": 0,
              "total": 10,
              "stressCorrect": 0,
              "stressTotal": 8,
              "stressAccuracy": 0,
              "misreadCount": 8,
              "misreadRate": 1,
              "ambiguousCount": 8,
              "wrongMatches": {},
              "worstMargin": 0
            },
            "2": {
              "canvasPx": 2,
              "inkPx": 1.6,
              "correct": 0,
              "total": 10,
              "stressCorrect": 0,
              "stressTotal": 8,
              "stressAccuracy": 0,
              "misreadCount": 8,
              "misreadRate": 1,
              "ambiguousCount": 6,
              "wrongMatches": {
                "socks": 1,
                "guitar": 1
              },
              "worstMargin": -0.15033
            },
            "3": {
              "canvasPx": 3,
              "inkPx": 2.4,
              "correct": 3,
              "total": 10,
              "stressCorrect": 1,
              "stressTotal": 8,
              "stressAccuracy": 0.125,
              "misreadCount": 7,
              "misreadRate": 0.875,
              "ambiguousCount": 0,
              "wrongMatches": {
                "hand": 1,
                "puzzle": 1,
                "envelope": 1,
                "bowl": 4
              },
              "worstMargin": -0.11532
            },
            "4": {
              "canvasPx": 4,
              "inkPx": 3.2,
              "correct": 6,
              "total": 10,
              "stressCorrect": 4,
              "stressTotal": 8,
              "stressAccuracy": 0.5,
              "misreadCount": 4,
              "misreadRate": 0.5,
              "ambiguousCount": 0,
              "wrongMatches": {
                "hand": 1,
                "basket": 1,
                "square": 1,
                "cookie": 1
              },
              "worstMargin": -0.03918
            },
            "5": {
              "canvasPx": 5,
              "inkPx": 4,
              "correct": 6,
              "total": 10,
              "stressCorrect": 4,
              "stressTotal": 8,
              "stressAccuracy": 0.5,
              "misreadCount": 4,
              "misreadRate": 0.5,
              "ambiguousCount": 0,
              "wrongMatches": {
                "hand": 1,
                "puzzle": 1,
                "cookie": 2
              },
              "worstMargin": -0.02655
            },
            "6": {
              "canvasPx": 6,
              "inkPx": 4.8,
              "correct": 8,
              "total": 10,
              "stressCorrect": 6,
              "stressTotal": 8,
              "stressAccuracy": 0.75,
              "misreadCount": 2,
              "misreadRate": 0.25,
              "ambiguousCount": 0,
              "wrongMatches": {
                "bowl": 2
              },
              "worstMargin": -0.01562
            },
            "7": {
              "canvasPx": 7,
              "inkPx": 5.6,
              "correct": 10,
              "total": 10,
              "stressCorrect": 8,
              "stressTotal": 8,
              "stressAccuracy": 1,
              "misreadCount": 0,
              "misreadRate": 0,
              "ambiguousCount": 0,
              "wrongMatches": {},
              "worstMargin": 0.00219
            },
            "8": {
              "canvasPx": 8,
              "inkPx": 6.4,
              "correct": 10,
              "total": 10,
              "stressCorrect": 8,
              "stressTotal": 8,
              "stressAccuracy": 1,
              "misreadCount": 0,
              "misreadRate": 0,
              "ambiguousCount": 0,
              "wrongMatches": {},
              "worstMargin": 0.00121
            },
            "9": {
              "canvasPx": 9,
              "inkPx": 7.2,
              "correct": 10,
              "total": 10,
              "stressCorrect": 8,
              "stressTotal": 8,
              "stressAccuracy": 1,
              "misreadCount": 0,
              "misreadRate": 0,
              "ambiguousCount": 0,
              "wrongMatches": {},
              "worstMargin": 0.00848
            },
            "10": {
              "canvasPx": 10,
              "inkPx": 8,
              "correct": 10,
              "total": 10,
              "stressCorrect": 8,
              "stressTotal": 8,
              "stressAccuracy": 1,
              "misreadCount": 0,
              "misreadRate": 0,
              "ambiguousCount": 0,
              "wrongMatches": {},
              "worstMargin": 0.00795
            },
            "11": {
              "canvasPx": 11,
              "inkPx": 8.8,
              "correct": 10,
              "total": 10,
              "stressCorrect": 8,
              "stressTotal": 8,
              "stressAccuracy": 1,
              "misreadCount": 0,
              "misreadRate": 0,
              "ambiguousCount": 0,
              "wrongMatches": {},
              "worstMargin": 0.01213
            },
            "12": {
              "canvasPx": 12,
              "inkPx": 9.6,
              "correct": 10,
              "total": 10,
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      "variants": [
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    {
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          },
          "spokenAliases": [
            "top arrow"
          ],
          "naming": {
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            "score": 4,
            "band": "good",
            "basis": "spoken-word-count-rule"
          }
        },
        {
          "id": "fa-down",
          "label": "Font Awesome, down",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(20.00000 10.00000) scale(0.1562500)\"><path d=\"M169.4 502.6c12.5 12.5 32.8 12.5 45.3 0l160-160c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0L224 402.7 224 32c0-17.7-14.3-32-32-32s-32 14.3-32 32l0 370.7-105.4-105.4c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3l160 160z\"/></g></svg>",
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            "name": "arrow-down",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/arrow-down.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
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            "wordCount": 2,
            "score": 4,
            "band": "good",
            "basis": "spoken-word-count-rule"
          }
        },
        {
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          "label": "Material arrow forward",
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          "source": {
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            "url": "https://raw.githubusercontent.com/google/material-design-icons/49d4db35df873165d6bd6ba09b063c7dafbac2f4/src/navigation/arrow_forward/materialicons/24px.svg",
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            "license": "Apache-2.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "right arrow",
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      ],
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        ],
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      "label": "Sun",
      "category": "weather",
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      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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      "variants": [
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          "pairwiseDistinctness": "reviewer-a: Snowflake and star become similar spiky spots on the 8-pixel sheet. | reviewer-b: Snowflake and star share the radial outline at small size.",
          "memorability": "reviewer-a: A ring with rays gives a strong daylight association. | reviewer-b: The radiating sun provides a strong image association.",
          "familiarity": "reviewer-a: Sun imagery is common in weather, education and daily life. | reviewer-b: The sun and its common pictogram are broadly known.",
          "shortNaming": "“sun” has 1 spoken word: ideal."
        },
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          {
            "id": "apple",
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          {
            "id": "circle",
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          },
          {
            "id": "truck",
            "cosine": 0.8782
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        ],
        "nearestAt32px": [
          {
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          {
            "id": "circle",
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          {
            "id": "sofa",
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        ]
      },
      "priorEstimates": {
        "recognizability": 5,
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      },
      "scores": {
        "recognizability": 4.4,
        "pairwiseDistinctness": 4,
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        "shortNaming": 5
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          {
            "reviewer": "reviewer-a",
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            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
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        },
        "reviewerRanges": {
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            4
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        },
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          "recognizability": "reviewer-a: The broad cloud lobes remain at 16, though the smallest stress form is a blob. | reviewer-b: The rounded lobes remain, though tiny rendering becomes a lump. | Machine robustness 5.00/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Bread can approach the same domed, rounded shape when reduced. | reviewer-b: Bread has a similarly rounded top when details vanish.",
          "memorability": "reviewer-a: The clustered cloud outline gives a straightforward weather cue. | reviewer-b: The clustered lobes provide a good weather cue.",
          "familiarity": "reviewer-a: Clouds are familiar natural objects and weather symbols. | reviewer-b: Clouds and cloud pictograms are broadly familiar.",
          "shortNaming": "“cloud” has 1 spoken word: ideal."
        },
        "aiConfusions": [
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        ],
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              "stressAccuracy": 0.625,
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            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
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      },
      "defaultRank": 30,
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    },
    {
      "id": "lightning",
      "label": "Lightning",
      "category": "weather",
      "naming": {
        "name": "lightning",
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        "wordCount": 1,
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        "memorability": 5,
        "basis": "ai-screening-consensus"
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      "note": "Lightning, bolt and thunder are plausible competing names.",
      "englishWordCount": 1,
      "priority": "test-first",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
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      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(15.00000 10.00000) scale(0.1562500)\"><path d=\"M338.8-9.9c11.9 8.6 16.3 24.2 10.9 37.8L271.3 224 416 224c13.5 0 25.5 8.4 30.1 21.1s.7 26.9-9.6 35.5l-288 240c-11.3 9.4-27.4 9.9-39.3 1.3s-16.3-24.2-10.9-37.8L176.7 288 32 288c-13.5 0-25.5-8.4-30.1-21.1s-.7-26.9 9.6-35.5l288-240c11.3-9.4 27.4-9.9 39.3-1.3z\"/></g></svg>",
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            "library": "Font Awesome Free Solid",
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            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/bolt.svg",
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            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "lightning",
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      ],
      "automated": {
        "nearestAt8px": [
          {
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          {
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          {
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        ],
        "nearestAt16px": [
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          {
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          {
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        ],
        "nearestAt32px": [
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          {
            "reviewer": "reviewer-a",
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            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
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        ],
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        },
        "reviewerRanges": {
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          "pairwiseDistinctness": [
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            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The offset zigzag is strong at 16 and 32 but loses crisp corners in stressed 8. | reviewer-b: The angular bolt retains its stepped pointed silhouette. | Machine robustness 4.93/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Its angular bolt differs clearly from the stepped stairs. | reviewer-b: Its sharp zigzag separates from the rounded and crossed marks.",
          "memorability": "reviewer-a: The sharp bolt is an easy storm and electricity cue. | reviewer-b: The bolt gives a strong compact mental cue.",
          "familiarity": "reviewer-a: Lightning symbols are broadly used in weather and power graphics. | reviewer-b: Lightning bolts are common weather and power symbols.",
          "shortNaming": "“lightning” has 1 spoken word: ideal."
        },
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      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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      "variants": [
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          "memorability": "reviewer-a: The narrowing swirl gives a useful storm cue. | reviewer-b: The tapering swirl offers a fairly distinctive association.",
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    {
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          },
          {
            "id": "battery",
            "cosine": 0.86
          }
        ],
        "nearestAt16px": [
          {
            "id": "envelope",
            "cosine": 0.7337
          },
          {
            "id": "keyboard",
            "cosine": 0.7139
          },
          {
            "id": "battery",
            "cosine": 0.7056
          }
        ],
        "nearestAt32px": [
          {
            "id": "envelope",
            "cosine": 0.6825
          },
          {
            "id": "battery",
            "cosine": 0.646
          },
          {
            "id": "laptop",
            "cosine": 0.6375
          }
        ]
      },
      "priorEstimates": {
        "recognizability": 3,
        "familiarity": 5
      },
      "scores": {
        "recognizability": 3.5778,
        "pairwiseDistinctness": 3.5,
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        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 3,
          "pairwiseDistinctness": 3.5,
          "memorability": 3,
          "familiarity": 5
        },
        "reviewerRanges": {
          "recognizability": [
            3,
            3
          ],
          "pairwiseDistinctness": [
            3,
            4
          ],
          "memorability": [
            3,
            3
          ],
          "familiarity": [
            5,
            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: Three wavy lines read at 32 but their gaps are weak in the small stress sheet. | reviewer-b: The three wavy lines crowd into a patterned patch. | Machine robustness 4.44/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Rainbow also consists of nested curved strokes. | reviewer-b: Rainbow also consists of closely stacked curved strokes.",
          "memorability": "reviewer-a: The repeated ripples suggest water, though the image is fairly generic. | reviewer-b: The repeated lines give a water cue but lack a singular silhouette.",
          "familiarity": "reviewer-a: Waves are broadly known through water and weather imagery. | reviewer-b: Waves and water symbols are broadly familiar.",
          "shortNaming": "“wave” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "rainbow"
        ],
        "raster": {
          "id": "wave",
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                "socks": 1,
                "moon": 1,
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              "worstMargin": -0.31485
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                "leaf": 1,
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              "worstMargin": -0.22943
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                "cheese": 1,
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              "worstMargin": -0.07454
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              "canvasPx": 5,
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              "correct": 8,
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              "stressAccuracy": 0.75,
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              "wrongMatches": {
                "calendar": 2
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              "worstMargin": -0.02338
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                "drum": 1,
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              "worstMargin": -0.1028
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          },
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          "conditionCount": 10,
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          "trialCount": 190,
          "minReliableCanvasPx": 10,
          "threshold": {
            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
            "minReliableCanvasPx": 10,
            "minimumTestedCanvasPx": 1,
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            "atMinimum": {
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            },
            "justBelow": {
              "canvasPx": 9,
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              "correct": 8,
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                "battery": 2
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          }
        }
      },
      "defaultRank": 104,
      "defaultOverall": 76.6224
    },
    {
      "id": "droplet",
      "label": "Droplet",
      "category": "nature",
      "naming": {
        "name": "droplet",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
      },
      "preliminary": {
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        "pairwiseDistinctness": 3,
        "memorability": 4.5,
        "basis": "ai-screening-consensus"
      },
      "note": "Drop, water and tear compete; inspect confusion with flame and leaf.",
      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
        "idealCanvasPx": null,
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        "hardCanvasPx": null,
        "notIdentifiableCanvasPx": null,
        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
        "delayedRecall": null
      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(20.00000 10.00000) scale(0.1562500)\"><path d=\"M192 512C86 512 0 426 0 320 0 228.8 130.2 45.9 166.6-3.5 172.5-11.5 181.8-16 191.8-16l.4 0c10 0 19.3 4.5 25.2 12.5 36.4 49.4 166.6 232.3 166.6 323.5 0 106-86 192-192 192zM112 312c0-13.3-10.7-24-24-24s-24 10.7-24 24c0 75.1 60.9 136 136 136 13.3 0 24-10.7 24-24s-10.7-24-24-24c-48.6 0-88-39.4-88-88z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "droplet",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/droplet.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "droplet",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "tree",
            "cosine": 0.9723
          },
          {
            "id": "egg",
            "cosine": 0.9566
          },
          {
            "id": "bottle",
            "cosine": 0.9328
          }
        ],
        "nearestAt16px": [
          {
            "id": "tree",
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          },
          {
            "id": "egg",
            "cosine": 0.9018
          },
          {
            "id": "bell",
            "cosine": 0.8971
          }
        ],
        "nearestAt32px": [
          {
            "id": "tree",
            "cosine": 0.8786
          },
          {
            "id": "egg",
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          },
          {
            "id": "bell",
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        ]
      },
      "priorEstimates": {
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      "scores": {
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        "shortNaming": 5
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      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
        "aiMeans": {
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        },
        "reviewerRanges": {
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            5
          ],
          "pairwiseDistinctness": [
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            3
          ],
          "memorability": [
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            5
          ],
          "familiarity": [
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            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The pointed top and rounded bottom read at 16; the interior cut weakens at stressed 8. | reviewer-b: The single tapered drop remains clear despite loss of its highlight. | Machine robustness 4.93/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Fire has a similar outer shape, while egg becomes a related small oval. | reviewer-b: Fire shares the outer point and rounded base.",
          "memorability": "reviewer-a: A single drop gives a simple water cue. | reviewer-b: The clean droplet provides a strong compact cue.",
          "familiarity": "reviewer-a: Water drops are familiar natural and interface symbols. | reviewer-b: Water droplets are broadly familiar.",
          "shortNaming": "“droplet” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "fire",
          "egg"
        ],
        "raster": {
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                "hand": 1,
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              "worstMargin": -0.19375
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              "worstMargin": -0.03665
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            },
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              "stressAccuracy": 0.875,
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            },
            "9": {
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            "10": {
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            "16": {
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      "priority": "redraw-or-validate",
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        "assessment": "subjective AI screening with measured machine robustness",
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      "variants": [
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          "memorability": "reviewer-a: The snout and tail provide an accessible pet cue. | reviewer-b: The dog offers a strong everyday mental cue.",
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          "shortNaming": "“dog” has 1 spoken word: ideal."
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          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(20.00000 10.00000) scale(0.1562500)\"><path d=\"M248 24a56 56 0 1 0 -112 0 56 56 0 1 0 112 0zm24 212.7l46.3 62.4c10.5 14.2 30.6 17.2 44.8 6.6s17.2-30.6 6.6-44.8l-70.5-95C274 132 234.3 112 192 112s-82 20-107.2 53.9l-70.5 95c-10.5 14.2-7.6 34.2 6.6 44.8s34.2 7.6 44.8-6.6L112 236.7 112 512c0 17.7 14.3 32 32 32s32-14.3 32-32l0-160c0-8.8 7.2-16 16-16s16 7.2 16 16l0 160c0 17.7 14.3 32 32 32s32-14.3 32-32l0-275.3z\"/></g></svg>",
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            "library": "Font Awesome Free Solid",
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            "name": "person",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/person.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
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          "naming": {
            "name": "person",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
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        }
      ],
      "automated": {
        "nearestAt8px": [
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            "id": "plus",
            "cosine": 0.9087
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          {
            "id": "microphone",
            "cosine": 0.8958
          },
          {
            "id": "lightning",
            "cosine": 0.8883
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        ],
        "nearestAt16px": [
          {
            "id": "bottle",
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          {
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            "cosine": 0.799
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          {
            "id": "microphone",
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        ],
        "nearestAt32px": [
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            "id": "droplet",
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          {
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          {
            "id": "lightbulb",
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        ]
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      "scores": {
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        "pairwiseDistinctness": 4.5,
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        "shortNaming": 5
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          {
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      "label": "Hand",
      "category": "body",
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      "englishWordCount": 1,
      "priority": "redraw-or-validate",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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      "variants": [
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          "shortNaming": "“hand” has 1 spoken word: ideal."
        },
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            "id": "socks",
            "cosine": 0.8225
          },
          {
            "id": "lemon",
            "cosine": 0.8178
          },
          {
            "id": "paperclip",
            "cosine": 0.8145
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        ],
        "nearestAt16px": [
          {
            "id": "bread",
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          {
            "id": "cup",
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          },
          {
            "id": "horse",
            "cosine": 0.6922
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        ],
        "nearestAt32px": [
          {
            "id": "bread",
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          {
            "id": "cup",
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          },
          {
            "id": "horse",
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        ]
      },
      "priorEstimates": {
        "recognizability": 3,
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      },
      "scores": {
        "recognizability": 3.7704,
        "pairwiseDistinctness": 3,
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        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
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          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
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        ],
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        },
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          "pairwiseDistinctness": "reviewer-a: Paperclip and worm are nearby curled line shapes. | reviewer-b: Paperclip shares a curved open loop at small size.",
          "memorability": "reviewer-a: The folded ear outline provides a good listening cue at the larger size. | reviewer-b: The curled outline offers a useful anatomical cue.",
          "familiarity": "reviewer-a: Ears are familiar body parts. | reviewer-b: Ears are broadly familiar worldwide.",
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    {
      "id": "tooth",
      "label": "Tooth",
      "category": "body",
      "naming": {
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        "language": "en",
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        "basis": "ai-screening-consensus"
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      "note": "Roots create a distinct shape; test against shirt and bell.",
      "englishWordCount": 1,
      "priority": "test-first",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
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      "variants": [
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            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
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          {
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        ],
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            "reviewer": "reviewer-a",
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            "method": "AI image-based screening with labeled pixel sheets",
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          },
          {
            "reviewer": "reviewer-b",
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        },
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          "pairwiseDistinctness": "reviewer-a: Brain can also become two adjoining vertical dark lobes at small size. | reviewer-b: Brain also has paired vertical lobes, though the root shape helps.",
          "memorability": "reviewer-a: The paired roots make a memorable dental cue. | reviewer-b: The two roots create a strong compact anatomical cue.",
          "familiarity": "reviewer-a: Teeth are broadly familiar through daily life and dental imagery. | reviewer-b: Teeth and tooth pictograms are broadly known.",
          "shortNaming": "“tooth” has 1 spoken word: ideal."
        },
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            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "pepper",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "ruler",
            "cosine": 0.9152
          },
          {
            "id": "wheat",
            "cosine": 0.9079
          },
          {
            "id": "brush",
            "cosine": 0.9064
          }
        ],
        "nearestAt16px": [
          {
            "id": "brush",
            "cosine": 0.835
          },
          {
            "id": "ruler",
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          },
          {
            "id": "key",
            "cosine": 0.8161
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        ],
        "nearestAt32px": [
          {
            "id": "brush",
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          },
          {
            "id": "ruler",
            "cosine": 0.7777
          },
          {
            "id": "key",
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        ]
      },
      "priorEstimates": {
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      },
      "scores": {
        "recognizability": 3.7408,
        "pairwiseDistinctness": 3,
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        "shortNaming": 5
      },
      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
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          "recognizability": 3,
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        },
        "reviewerRanges": {
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          "pairwiseDistinctness": [
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            5
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        },
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          "pairwiseDistinctness": "reviewer-a: Carrot and brush also have tapered diagonal silhouettes. | reviewer-b: Carrot shares its diagonal body and leafy upper end.",
          "memorability": "reviewer-a: The curved pointed chili gives a useful food cue. | reviewer-b: The curved chili shape gives a good mental cue.",
          "familiarity": "reviewer-a: Peppers are broadly known foods, though their common forms vary. | reviewer-b: Chili peppers are broadly familiar worldwide.",
          "shortNaming": "“pepper” has 1 spoken word: ideal."
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        "aiConfusions": [
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          "threshold": {
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    },
    {
      "id": "egg",
      "label": "Egg",
      "category": "food",
      "naming": {
        "name": "egg",
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        "wordCount": 1,
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        "basis": "ai-screening-consensus"
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      "note": "Almost an oval; test against droplet and lemon without context.",
      "englishWordCount": 1,
      "priority": "redraw-or-validate",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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      "human": {
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      "variants": [
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          "label": "Font Awesome baseline",
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          "naming": {
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      ],
      "automated": {
        "nearestAt8px": [
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          {
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          },
          {
            "id": "droplet",
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        ],
        "nearestAt16px": [
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          {
            "id": "circle",
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          {
            "id": "droplet",
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        ],
        "nearestAt32px": [
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          {
            "id": "bread",
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          {
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            "method": "AI image-based screening with labeled pixel sheets",
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          {
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            "model": "gpt-6.1-sol",
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        },
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          "pairwiseDistinctness": "reviewer-a: Circle and droplet approach the same compact rounded mass. | reviewer-b: Circle approaches the same solid rounded mark when tiny.",
          "memorability": "reviewer-a: A plain oval is easy to picture but offers a generic cue. | reviewer-b: The simple oval gives a good but generic cue.",
          "familiarity": "reviewer-a: Eggs are broadly familiar foods. | reviewer-b: Eggs are broadly familiar worldwide.",
          "shortNaming": "“egg” has 1 spoken word: ideal."
        },
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      "priorEstimates": {
        "recognizability": 4,
        "familiarity": 5
      },
      "scores": {
        "recognizability": 4.3259,
        "pairwiseDistinctness": 3,
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        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
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            4
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            5,
            5
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        },
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          "recognizability": "reviewer-a: The oval bowl and diagonal shaft remain a simple readable form at 16. | reviewer-b: The round head is strong, but the thin handle loses clarity in the stress view. | Machine robustness 4.81/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Microphone and guitar share a rounded end on a diagonal handle. | reviewer-b: Microphone and key use a similar head-and-stem construction.",
          "memorability": "reviewer-a: The oval scoop supplies a direct utensil cue. | reviewer-b: The simple utensil profile is a strong cue.",
          "familiarity": "reviewer-a: Spoons are common eating utensils worldwide. | reviewer-b: Spoons are broadly familiar worldwide.",
          "shortNaming": "“spoon” has 1 spoken word: ideal."
        },
        "aiConfusions": [
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          "threshold": {
            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
            "minReliableCanvasPx": 9,
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    },
    {
      "id": "pizza",
      "label": "Pizza",
      "category": "table",
      "naming": {
        "name": "pizza",
        "language": "en",
        "wordCount": 1,
        "score": 5,
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        "basis": "spoken-word-count-rule"
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      "preliminary": {
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        "basis": "ai-screening-consensus"
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      "note": "Slice and toppings are culturally learned; detail loss produces a triangle.",
      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
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      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(10.00000 10.00000) scale(0.1562500)\"><path d=\"M169.7 .9c-22.8-1.6-41.9 14-47.5 34.7L112.5 72C293.3 72.3 439.7 218.7 440 399.5l36.4-9.7c20.8-5.5 36.3-24.7 34.7-47.5-12.6-182.8-158.6-328.8-341.4-341.4zm222 411.5c.2-4.1 .3-8.2 .3-12.4 0-154.6-125.4-280-280-280-4.1 0-8.3 .1-12.4 .3L.5 491.9c-1.5 5.5 .1 11.4 4.1 15.4s9.9 5.6 15.4 4.1l371.6-99.1zM176 208a32 32 0 1 1 0 64 32 32 0 1 1 0-64zm64 128a32 32 0 1 1 64 0 32 32 0 1 1 -64 0zM96 384a32 32 0 1 1 64 0 32 32 0 1 1 -64 0z\"/></g></svg>",
          "source": {
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            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/pizza-slice.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
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      ],
      "automated": {
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            "id": "lemon",
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          {
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          },
          {
            "id": "cloud",
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        ],
        "nearestAt16px": [
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            "method": "AI image-based screening with labeled pixel sheets",
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          {
            "reviewer": "reviewer-b",
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          "pairwiseDistinctness": "reviewer-a: Cheese shares the triangular food-wedge shape. | reviewer-b: Cheese is also a triangular food wedge.",
          "memorability": "reviewer-a: A topped slice gives a strong food association. | reviewer-b: The pointed slice provides a strong food association.",
          "familiarity": "reviewer-a: Pizza is widely known, especially among internet users. | reviewer-b: Pizza and its slice icon are widely known.",
          "shortNaming": "“pizza” has 1 spoken word: ideal."
        },
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            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
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          "pairwiseDistinctness": "reviewer-a: Sofa and bed can share a small furniture frame with a low seat. | reviewer-b: Toilet also combines an upright back with a lower seat-like body.",
          "memorability": "reviewer-a: The back over the seat gives a usable furniture cue, though the frame is generic. | reviewer-b: The tall back offers a good furniture cue.",
          "familiarity": "reviewer-a: Chairs are broadly familiar furniture. | reviewer-b: Chairs are broadly familiar worldwide.",
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            "minReliableCanvasPx": 8,
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        "basis": "ai-screening-consensus"
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      "note": "Bath and bathtub compete; the shower detail is unnecessary for the base concept.",
      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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        "participants": 0,
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        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
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      "variants": [
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        },
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          "pairwiseDistinctness": "reviewer-a: Bed and sofa share a long supported container-like silhouette. | reviewer-b: Bed and sofa also have broad horizontal bodies with short supports.",
          "memorability": "reviewer-a: The tub and tap give a good bathing cue when both are visible. | reviewer-b: The raised faucet supplies a good bathroom cue while visible.",
          "familiarity": "reviewer-a: Bathtubs are widely known, though not used in every home. | reviewer-b: Bathtubs are common in media but less universal in daily use.",
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        },
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        "assessment": "subjective AI screening with measured machine robustness",
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      "variants": [
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
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            "source": "./assets/symbol-reviewer-a.json"
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          {
            "reviewer": "reviewer-b",
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          "memorability": "reviewer-a: The repeated rise gives an easy climbing cue. | reviewer-b: The rising path gives a clear spatial cue.",
          "familiarity": "reviewer-a: Stairs are familiar in buildings and signage. | reviewer-b: Stairs are broadly familiar worldwide.",
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      "englishWordCount": 1,
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      "confidence": {
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        "crossCultural": "AI estimate, not population evidence"
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      },
      "variants": [
        {
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          "memorability": "reviewer-a: The two bent feet give a good clothing cue. | reviewer-b: The bent pair gives a good clothing association.",
          "familiarity": "reviewer-a: Socks are widely familiar garments. | reviewer-b: Socks are broadly familiar worldwide.",
          "shortNaming": "“socks” has 1 spoken word: ideal."
        },
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            "cosine": 0.8117
          },
          {
            "id": "cloud",
            "cosine": 0.7908
          },
          {
            "id": "bell",
            "cosine": 0.7871
          }
        ]
      },
      "priorEstimates": {
        "recognizability": 3,
        "familiarity": 4
      },
      "scores": {
        "recognizability": 4.4,
        "pairwiseDistinctness": 4.5,
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        "shortNaming": 5
      },
      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
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        },
        "reviewerRanges": {
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          "pairwiseDistinctness": "reviewer-a: Bread shares a dome above a flatter lower section. | reviewer-b: The broad low brim separates it from other clothing glyphs.",
          "memorability": "reviewer-a: The brim makes an easy headwear cue. | reviewer-b: The brimmed profile offers a good mental cue.",
          "familiarity": "reviewer-a: Hats are broadly familiar clothing. | reviewer-b: Hats are broadly familiar, though styles vary.",
          "shortNaming": "“hat” has 1 spoken word: ideal."
        },
        "aiConfusions": [
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        ],
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          "minReliableCanvasPx": 8,
          "threshold": {
            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
            "minReliableCanvasPx": 8,
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    {
      "id": "footprints",
      "label": "Footprints",
      "category": "clothing",
      "naming": {
        "name": "footprints",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
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        "basis": "ai-screening-consensus"
      },
      "note": "Shoeprints and footprints compete; do not count left and right as separate concepts.",
      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
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        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
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      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(10.00000 14.44444) scale(0.1388889)\"><path d=\"M296 192c-21.1-12.1-42.3-24.2-72-29.3l0-140.3C257.7 13 311.4 0 352 0 448 0 576 48 576 128s-119.6 96-176 96c-48 0-76-16-104-32zM128 32l48 0 0 128-48 0c-35.3 0-64-28.7-64-64s28.7-64 64-64zM232 320c28-16 56-32 104-32 56.4 0 176 16 176 96S384 512 288 512c-40.5 0-94.3-13-128-22.4l0-140.3c29.7-5.2 50.9-17.3 72-29.4zM64 480c-35.3 0-64-28.7-64-64s28.7-64 64-64l48 0 0 128-48 0z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "shoe-prints",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/shoe-prints.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "footprints",
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      ],
      "automated": {
        "nearestAt8px": [
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            "id": "bowl",
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          },
          {
            "id": "gift",
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          },
          {
            "id": "lemon",
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        ],
        "nearestAt16px": [
          {
            "id": "bowl",
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          {
            "id": "bread",
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        ],
        "nearestAt32px": [
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          {
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      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
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          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: Heel and toe clusters show at 32, but the tiny toes weaken strongly under stress. | reviewer-b: The paired soles remain, but detached heel marks shrink. | Machine robustness 4.85/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Socks also presents a paired set of bent foot-shaped marks. | reviewer-b: Socks also forms a pair of small foot-shaped marks.",
          "memorability": "reviewer-a: The walking trail provides a strong movement cue. | reviewer-b: The alternating pair gives a clear walking association.",
          "familiarity": "reviewer-a: Footprints are broadly familiar through everyday life and signage. | reviewer-b: Footprint imagery is broadly familiar.",
          "shortNaming": "“footprints” has 1 spoken word: ideal."
        },
        "aiConfusions": [
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        ],
        "raster": {
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    {
      "id": "crown",
      "label": "Crown",
      "category": "clothing",
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        "name": "crown",
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      "note": "Recognizable convention; test against flower, mountain and stylized tooth.",
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      "priority": "test-first",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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      "variants": [
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          "id": "fa-baseline",
          "label": "Font Awesome baseline",
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            "library": "Font Awesome Free Solid",
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            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/crown.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
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          "naming": {
            "name": "crown",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
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            "id": "flower",
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          {
            "id": "apple",
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          },
          {
            "id": "star",
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        ],
        "nearestAt16px": [
          {
            "id": "flower",
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          {
            "id": "cloud",
            "cosine": 0.8502
          },
          {
            "id": "star",
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        ],
        "nearestAt32px": [
          {
            "id": "flower",
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          {
            "id": "apple",
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          {
            "id": "cloud",
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      "priorEstimates": {
        "recognizability": 4,
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      "scores": {
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        "pairwiseDistinctness": 4.5,
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        "shortNaming": 5
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      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
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            "source": "./assets/symbol-reviewer-b.json"
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        "reviewerRanges": {
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          "pairwiseDistinctness": "reviewer-a: Flower is the nearest three-pronged compact shape at the smallest size. | reviewer-b: Its upward points over one flat band have no close match here.",
          "memorability": "reviewer-a: The pointed royal headwear gives a strong status cue. | reviewer-b: The pointed crown supplies a strong status association.",
          "familiarity": "reviewer-a: Crowns are widely known through stories, symbols and entertainment. | reviewer-b: Crown imagery is widely used in media and interfaces.",
          "shortNaming": "“crown” has 1 spoken word: ideal."
        },
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            "version": "7.3.1",
            "name": "scissors",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/scissors.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "scissors",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "square",
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          {
            "id": "envelope",
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          },
          {
            "id": "gift",
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        ],
        "nearestAt16px": [
          {
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          {
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          {
            "id": "tooth",
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        ],
        "nearestAt32px": [
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          {
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          {
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      },
      "priorEstimates": {
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      },
      "scores": {
        "recognizability": 4.3704,
        "pairwiseDistinctness": 4.5,
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        "shortNaming": 5
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
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        "reviewerRanges": {
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          "pairwiseDistinctness": "reviewer-a: No other pool item combines paired loops with an X-like blade structure. | reviewer-b: Glasses shares the paired loops, though the blades usually distinguish it.",
          "memorability": "reviewer-a: The crossed blades make a strong cutting cue. | reviewer-b: The crossed two-loop form provides a strong cue.",
          "familiarity": "reviewer-a: Scissors are familiar everyday tools. | reviewer-b: Scissors are broadly familiar worldwide.",
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        },
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                "house": 1,
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    {
      "id": "brush",
      "label": "Brush",
      "category": "tools",
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        "name": "brush",
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        "score": 5,
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        "basis": "ai-screening-consensus"
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      "note": "Brush and paintbrush compete; inspect against pencil and screwdriver.",
      "englishWordCount": 1,
      "priority": "redraw-or-validate",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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        "voiceTransmissionAccuracy": null,
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      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(10.00000 14.44444) scale(0.1388889)\"><path d=\"M480.5 10.3L259.1 158c-29.1 19.4-47.6 50.9-50.6 85.3 62.3 12.8 111.4 61.9 124.3 124.3 34.5-3 65.9-21.5 85.3-50.6L565.7 95.5c6.7-10.1 10.3-21.9 10.3-34.1 0-33.9-27.5-61.4-61.4-61.4-12.1 0-24 3.6-34.1 10.3zM288 400c0-61.9-50.1-112-112-112S64 338.1 64 400c0 3.9 .2 7.8 .6 11.6 1.8 17.5-10.2 36.4-27.8 36.4L32 448c-17.7 0-32 14.3-32 32s14.3 32 32 32l144 0c61.9 0 112-50.1 112-112z\"/></g></svg>",
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            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
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          {
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        ],
        "nearestAt16px": [
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            "id": "pencil",
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            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        },
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          "pairwiseDistinctness": "reviewer-a: Pencil and screwdriver share the same short diagonal arrangement. | reviewer-b: Screwdriver and spoon share a narrow diagonal handle with a heavier end.",
          "memorability": "reviewer-a: The bristle head gives a painting cue, though its fine distinction is fragile. | reviewer-b: The broad brush head supplies a good painting association.",
          "familiarity": "reviewer-a: Paintbrushes are broadly known through school and art. | reviewer-b: Paintbrushes are broadly familiar worldwide.",
          "shortNaming": "“brush” has 1 spoken word: ideal."
        },
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          "naming": {
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            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
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          {
            "id": "cloud",
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          {
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        ],
        "nearestAt16px": [
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      "priorEstimates": {
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      "scores": {
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        "assessment": "subjective AI screening with measured machine robustness",
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          "memorability": "reviewer-a: The fuller central body gives a useful motorbike cue at the larger size. | reviewer-b: The powered-bike silhouette gives a good but detail-dependent cue.",
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            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
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          "naming": {
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            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
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            "whenNeeded": "Only when orientation is part of the identity to communicate; otherwise airplane remains one word."
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        },
        {
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          "qualifiedNaming": {
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            "wordCount": 2,
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            "basis": "spoken-word-count-rule",
            "whenNeeded": "Only when orientation is part of the identity to communicate; otherwise airplane remains one word."
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      "automated": {
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          {
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        ],
        "nearestAt16px": [
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          {
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        ],
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          {
            "id": "fish",
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      "scores": {
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        "pairwiseDistinctness": 3.5,
        "memorability": 4,
        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 3,
          "pairwiseDistinctness": 3.5,
          "memorability": 4,
          "familiarity": 5
        },
        "reviewerRanges": {
          "recognizability": [
            3,
            3
          ],
          "pairwiseDistinctness": [
            3,
            4
          ],
          "memorability": [
            4,
            4
          ],
          "familiarity": [
            5,
            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: Bow, cabin and water lines read at 32 but pile into a weak compact mark below. | reviewer-b: The mast and hull are useful, but the lower wave marks crowd. | Machine robustness 4.56/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Anchor is another compact upright nautical mark, with a different lower sweep. | reviewer-b: Anchor shares a central upright and outward lower arms.",
          "memorability": "reviewer-a: The bow over waves provides a useful water-travel cue. | reviewer-b: The hull above waves gives a good transport cue while visible.",
          "familiarity": "reviewer-a: Boats are broadly familiar through travel, work and imagery. | reviewer-b: Boats are broadly familiar worldwide.",
          "shortNaming": "“boat” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "anchor"
        ],
        "raster": {
          "id": "boat",
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                "drum": 1,
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                "hand": 1,
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                "mountain": 1,
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            },
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              "canvasPx": 13,
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              "stressCorrect": 8,
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              "canvasPx": 20,
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          },
          "score": 4.5556,
          "identityAccuracy": 0.7895,
          "weightedStressAccuracy": 0.8889,
          "conditionCount": 10,
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          "trialCount": 190,
          "minReliableCanvasPx": 11,
          "threshold": {
            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
            "minReliableCanvasPx": 11,
            "minimumTestedCanvasPx": 1,
            "maximumTestedCanvasPx": 32,
            "atMinimum": {
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            "justBelow": {
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      },
      "defaultRank": 81,
      "defaultOverall": 79.9776
    },
    {
      "id": "book",
      "label": "Book",
      "category": "paper",
      "naming": {
        "name": "book",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
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      "preliminary": {
        "recognizability": 3.9518,
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        "englishNaming": 5,
        "pairwiseDistinctness": 3,
        "memorability": 4,
        "basis": "ai-screening-consensus"
      },
      "note": "Closed and open books are variants; compare spine and page cues.",
      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
        "idealCanvasPx": null,
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        "hardCanvasPx": null,
        "notIdentifiableCanvasPx": null,
        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
        "delayedRecall": null
      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(15.00000 10.00000) scale(0.1562500)\"><path d=\"M384 512L96 512c-53 0-96-43-96-96L0 96C0 43 43 0 96 0L400 0c26.5 0 48 21.5 48 48l0 288c0 20.9-13.4 38.7-32 45.3l0 66.7c17.7 0 32 14.3 32 32s-14.3 32-32 32l-32 0zM96 384c-17.7 0-32 14.3-32 32s14.3 32 32 32l256 0 0-64-256 0zm32-232c0 13.3 10.7 24 24 24l176 0c13.3 0 24-10.7 24-24s-10.7-24-24-24l-176 0c-13.3 0-24 10.7-24 24zm24 72c-13.3 0-24 10.7-24 24s10.7 24 24 24l176 0c13.3 0 24-10.7 24-24s-10.7-24-24-24l-176 0z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "book",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/book.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "book",
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            "band": "ideal",
            "basis": "spoken-word-count-rule"
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      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "square",
            "cosine": 0.965
          },
          {
            "id": "brain",
            "cosine": 0.9373
          },
          {
            "id": "door",
            "cosine": 0.9315
          }
        ],
        "nearestAt16px": [
          {
            "id": "square",
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          },
          {
            "id": "toilet",
            "cosine": 0.8819
          },
          {
            "id": "door",
            "cosine": 0.8691
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        ],
        "nearestAt32px": [
          {
            "id": "square",
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          {
            "id": "toilet",
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          {
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      "priorEstimates": {
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      "scores": {
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        "pairwiseDistinctness": 3,
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        "shortNaming": 5
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      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
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        ],
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        "reviewerRanges": {
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          "pairwiseDistinctness": [
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            3
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          "memorability": [
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            4
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            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: Spine and pale text bands read at 32, but the small icon is chiefly a vertical block. | reviewer-b: The cover and page lines remain, but the small interior becomes bands. | Machine robustness 4.63/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Newspaper and door also use framed rectangles with pale internal bars. | reviewer-b: Newspaper and door share a vertical rectangle with light markings.",
          "memorability": "reviewer-a: The spine and pages give a useful reading cue. | reviewer-b: The bound rectangle offers a good reading association.",
          "familiarity": "reviewer-a: Books are broadly familiar objects. | reviewer-b: Books are broadly familiar worldwide.",
          "shortNaming": "“book” has 1 spoken word: ideal."
        },
        "aiConfusions": [
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          "door"
        ],
        "raster": {
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              "canvasPx": 24,
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          "familiarity": "reviewer-a: Envelopes are broadly known, including their email icon use. | reviewer-b: Envelope icons are widespread in communication interfaces.",
          "shortNaming": "“envelope” has 1 spoken word: ideal."
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      "variants": [
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            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "pepper",
            "cosine": 0.9152
          },
          {
            "id": "brush",
            "cosine": 0.9026
          },
          {
            "id": "wheat",
            "cosine": 0.8897
          }
        ],
        "nearestAt16px": [
          {
            "id": "brush",
            "cosine": 0.8275
          },
          {
            "id": "pepper",
            "cosine": 0.826
          },
          {
            "id": "chicken-leg",
            "cosine": 0.8147
          }
        ],
        "nearestAt32px": [
          {
            "id": "brush",
            "cosine": 0.7825
          },
          {
            "id": "pepper",
            "cosine": 0.7777
          },
          {
            "id": "chicken-leg",
            "cosine": 0.771
          }
        ]
      },
      "priorEstimates": {
        "recognizability": 3,
        "familiarity": 4
      },
      "scores": {
        "recognizability": 4.0704,
        "pairwiseDistinctness": 2.5,
        "memorability": 3.5,
        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 3.5,
          "pairwiseDistinctness": 2.5,
          "memorability": 3.5,
          "familiarity": 5
        },
        "reviewerRanges": {
          "recognizability": [
            3,
            4
          ],
          "pairwiseDistinctness": [
            2,
            3
          ],
          "memorability": [
            3,
            4
          ],
          "familiarity": [
            5,
            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The long bar survives, but measurement notches weaken quickly under small-size stress. | reviewer-b: The straight bar survives better than its small measurement ticks. | Machine robustness 4.93/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Pencil and screwdriver share the narrow diagonal outline. | reviewer-b: Pencil and wheat can also become toothed diagonal strokes.",
          "memorability": "reviewer-a: The ticked edge gives a measuring cue when visible, but the bar alone is generic. | reviewer-b: The ticked edge gives a good measurement association.",
          "familiarity": "reviewer-a: Rulers are broadly familiar school and work tools. | reviewer-b: Rulers are broadly familiar from schooling and work.",
          "shortNaming": "“ruler” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "pencil",
          "screwdriver",
          "wheat"
        ],
        "raster": {
          "id": "ruler",
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                "hand": 1,
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              "worstMargin": -0.24368
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              "worstMargin": -0.12786
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              "stressAccuracy": 0.625,
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              "worstMargin": -0.03748
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                "socks": 1
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          },
          "score": 4.9259,
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          "conditionCount": 10,
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          "minReliableCanvasPx": 7,
          "threshold": {
            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
            "minReliableCanvasPx": 7,
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      },
      "defaultRank": 95,
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    },
    {
      "id": "phone",
      "label": "Phone",
      "category": "technology",
      "naming": {
        "name": "phone",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
      },
      "preliminary": {
        "recognizability": 4.7,
        "familiarity": 5,
        "englishNaming": 5,
        "pairwiseDistinctness": 4.5,
        "memorability": 5,
        "basis": "ai-screening-consensus"
      },
      "note": "Handset convention may differ by age; mobile-device drawings belong to the same concept audit.",
      "englishWordCount": 1,
      "priority": "test-first",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
        "idealCanvasPx": null,
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        "hardCanvasPx": null,
        "notIdentifiableCanvasPx": null,
        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
        "delayedRecall": null
      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(10.00000 10.00000) scale(0.1562500)\"><path d=\"M160.2 25C152.3 6.1 131.7-3.9 112.1 1.4l-5.5 1.5c-64.6 17.6-119.8 80.2-103.7 156.4 37.1 175 174.8 312.7 349.8 349.8 76.3 16.2 138.8-39.1 156.4-103.7l1.5-5.5c5.4-19.7-4.7-40.3-23.5-48.1l-97.3-40.5c-16.5-6.9-35.6-2.1-47 11.8l-38.6 47.2C233.9 335.4 177.3 277 144.8 205.3L189 169.3c13.9-11.3 18.6-30.4 11.8-47L160.2 25z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "phone",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/phone.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "phone",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "bathtub",
            "cosine": 0.7748
          },
          {
            "id": "dice",
            "cosine": 0.7586
          },
          {
            "id": "moon",
            "cosine": 0.74
          }
        ],
        "nearestAt16px": [
          {
            "id": "bathtub",
            "cosine": 0.7523
          },
          {
            "id": "moon",
            "cosine": 0.7141
          },
          {
            "id": "dice",
            "cosine": 0.7004
          }
        ],
        "nearestAt32px": [
          {
            "id": "bathtub",
            "cosine": 0.722
          },
          {
            "id": "moon",
            "cosine": 0.6764
          },
          {
            "id": "dice",
            "cosine": 0.6617
          }
        ]
      },
      "priorEstimates": {
        "recognizability": 5,
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      },
      "scores": {
        "recognizability": 4.7,
        "pairwiseDistinctness": 4.5,
        "memorability": 5,
        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 4.5,
          "pairwiseDistinctness": 4.5,
          "memorability": 5,
          "familiarity": 5
        },
        "reviewerRanges": {
          "recognizability": [
            4,
            5
          ],
          "pairwiseDistinctness": [
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            5
          ],
          "memorability": [
            5,
            5
          ],
          "familiarity": [
            5,
            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The bent handset and enlarged ends read clearly at 16 despite low contrast. | reviewer-b: The curved handset and enlarged ends retain a clear telephone shape. | Machine robustness 5.00/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Moon is the nearest open curved silhouette when the handset ends are tiny. | reviewer-b: Its broad bent receiver has no close visual match here.",
          "memorability": "reviewer-a: The handset gives a strong calling cue. | reviewer-b: The curved receiver gives a strong communication cue.",
          "familiarity": "reviewer-a: Handset symbols are widely familiar through phone interfaces. | reviewer-b: The handset icon remains common in calling interfaces.",
          "shortNaming": "“phone” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "moon"
        ],
        "raster": {
          "id": "phone",
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              "canvasPx": 9,
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            },
            "10": {
              "canvasPx": 10,
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            "12": {
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      "note": "Bulb and lightbulb compete; base detail distinguishes it from balloon or head.",
      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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          "naming": {
            "name": "plug",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "shirt",
            "cosine": 0.9637
          },
          {
            "id": "heart",
            "cosine": 0.9542
          },
          {
            "id": "lightbulb",
            "cosine": 0.9195
          }
        ],
        "nearestAt16px": [
          {
            "id": "heart",
            "cosine": 0.8903
          },
          {
            "id": "lightbulb",
            "cosine": 0.8805
          },
          {
            "id": "pin",
            "cosine": 0.8725
          }
        ],
        "nearestAt32px": [
          {
            "id": "heart",
            "cosine": 0.8617
          },
          {
            "id": "shirt",
            "cosine": 0.8443
          },
          {
            "id": "pin",
            "cosine": 0.8426
          }
        ]
      },
      "priorEstimates": {
        "recognizability": 4,
        "familiarity": 4
      },
      "scores": {
        "recognizability": 4.0408,
        "pairwiseDistinctness": 4.5,
        "memorability": 4,
        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 3.5,
          "pairwiseDistinctness": 4.5,
          "memorability": 4,
          "familiarity": 5
        },
        "reviewerRanges": {
          "recognizability": [
            3,
            4
          ],
          "pairwiseDistinctness": [
            4,
            5
          ],
          "memorability": [
            4,
            4
          ],
          "familiarity": [
            5,
            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: Twin pins and lower stem show at 32 but compress into three small projections below. | reviewer-b: The prongs and hanging stem retain a useful electrical silhouette. | Machine robustness 4.85/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Seedling is another small form with upward prongs and a descending stem. | reviewer-b: The paired top prongs over a stalk have no close match here.",
          "memorability": "reviewer-a: The pins give a useful electricity cue. | reviewer-b: The pronged head offers a good power cue.",
          "familiarity": "reviewer-a: Electrical plugs are broadly known, despite regional socket differences. | reviewer-b: Electrical plugs are broadly known despite regional variations.",
          "shortNaming": "“plug” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "seedling"
        ],
        "raster": {
          "id": "plug",
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              "wrongMatches": {
                "arrow": 1,
                "guitar": 1,
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              "worstMargin": -0.29093
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              "correct": 5,
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              "stressAccuracy": 0.375,
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                "leaf": 1,
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              "worstMargin": -0.12215
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              "canvasPx": 4,
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              "stressCorrect": 5,
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              "stressAccuracy": 0.625,
              "misreadCount": 3,
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              "wrongMatches": {
                "socks": 1,
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              "worstMargin": -0.04615
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              "canvasPx": 5,
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              "canvasPx": 20,
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          },
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          "conditionCount": 10,
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          "trialCount": 190,
          "minReliableCanvasPx": 7,
          "threshold": {
            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
            "minReliableCanvasPx": 7,
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            "atMinimum": {
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            "justBelow": {
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      },
      "defaultRank": 35,
      "defaultOverall": 87.3264
    },
    {
      "id": "bell",
      "label": "Bell",
      "category": "everyday",
      "naming": {
        "name": "bell",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
      },
      "preliminary": {
        "recognizability": 4.3408,
        "familiarity": 5,
        "englishNaming": 5,
        "pairwiseDistinctness": 3.5,
        "memorability": 4.5,
        "basis": "ai-screening-consensus"
      },
      "note": "Clapper and base separate it from droplet, person and lightbulb.",
      "englishWordCount": 1,
      "priority": "compare",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
        "idealCanvasPx": null,
        "minimumReliableCanvasPx": null,
        "hardCanvasPx": null,
        "notIdentifiableCanvasPx": null,
        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
        "delayedRecall": null
      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(15.00000 10.00000) scale(0.1562500)\"><path d=\"M224 0c-17.7 0-32 14.3-32 32l0 3.2C119 50 64 114.6 64 192l0 21.7c0 48.1-16.4 94.8-46.4 132.4L7.8 358.3C2.7 364.6 0 372.4 0 380.5 0 400.1 15.9 416 35.5 416l376.9 0c19.6 0 35.5-15.9 35.5-35.5 0-8.1-2.7-15.9-7.8-22.2l-9.8-12.2C400.4 308.5 384 261.8 384 213.7l0-21.7c0-77.4-55-142-128-156.8l0-3.2c0-17.7-14.3-32-32-32zM162 464c7.1 27.6 32.2 48 62 48s54.9-20.4 62-48l-124 0z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "bell",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/bell.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "bell",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "tree",
            "cosine": 0.9576
          },
          {
            "id": "cloud",
            "cosine": 0.9291
          },
          {
            "id": "droplet",
            "cosine": 0.9271
          }
        ],
        "nearestAt16px": [
          {
            "id": "tree",
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          },
          {
            "id": "droplet",
            "cosine": 0.8971
          },
          {
            "id": "egg",
            "cosine": 0.8808
          }
        ],
        "nearestAt32px": [
          {
            "id": "tree",
            "cosine": 0.9026
          },
          {
            "id": "droplet",
            "cosine": 0.8725
          },
          {
            "id": "egg",
            "cosine": 0.8542
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        ]
      },
      "priorEstimates": {
        "recognizability": 4,
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      },
      "scores": {
        "recognizability": 4.3408,
        "pairwiseDistinctness": 3.5,
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        "familiarity": 5,
        "shortNaming": 5
      },
      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 4,
          "pairwiseDistinctness": 3.5,
          "memorability": 4.5,
          "familiarity": 5
        },
        "reviewerRanges": {
          "recognizability": [
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            4
          ],
          "pairwiseDistinctness": [
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            4
          ],
          "memorability": [
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            5
          ],
          "familiarity": [
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            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The domed shell and lower lip read at 16, with a less distinct lip in stressed 8. | reviewer-b: The dome and clapper remain useful while edge details soften. | Machine robustness 4.85/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Stamp has a similar rounded top and broad layered base. | reviewer-b: Stamp also has a rounded top and broad lower base.",
          "memorability": "reviewer-a: The flared skirt gives a useful ringing cue. | reviewer-b: The domed bell gives a strong alert association.",
          "familiarity": "reviewer-a: Bells are widely familiar through objects and notification icons. | reviewer-b: Bell icons are common in everyday and internet use.",
          "shortNaming": "“bell” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "stamp"
        ],
        "raster": {
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              "wrongMatches": {
                "hand": 1,
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              "worstMargin": -0.19311
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              "worstMargin": -0.08761
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            "4": {
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              "worstMargin": -0.04672
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              "stressAccuracy": 0.75,
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              "wrongMatches": {
                "cloud": 2
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              "worstMargin": -0.01225
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            },
            "8": {
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              "worstMargin": 0.0184
            },
            "9": {
              "canvasPx": 9,
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              "stressCorrect": 8,
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              "stressAccuracy": 1,
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            },
            "10": {
              "canvasPx": 10,
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              "worstMargin": 0.01025
            },
            "11": {
              "canvasPx": 11,
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              "correct": 10,
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            "12": {
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            "13": {
              "canvasPx": 13,
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            "14": {
              "canvasPx": 14,
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            "15": {
              "canvasPx": 15,
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          "pairwiseDistinctness": "reviewer-a: Newspaper and gift also use topped rectangular bodies with internal bars. | reviewer-b: Newspaper and book share a rectangular page with light bands.",
          "memorability": "reviewer-a: The tabbed page supplies a useful date cue. | reviewer-b: The tabbed page gives a good date association.",
          "familiarity": "reviewer-a: Calendars are broadly familiar in print and apps. | reviewer-b: Calendar icons are common in everyday and internet use.",
          "shortNaming": "“calendar” has 1 spoken word: ideal."
        },
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          "book"
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      },
      "defaultRank": 69,
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    },
    {
      "id": "compass",
      "label": "Compass",
      "category": "time-place",
      "naming": {
        "name": "compass",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
      },
      "preliminary": {
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        "englishNaming": 5,
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        "memorability": 4,
        "basis": "ai-screening-consensus"
      },
      "note": "Compass, direction and navigation compete; needle is a small detail.",
      "englishWordCount": 1,
      "priority": "redraw-or-validate",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
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        "hardCanvasPx": null,
        "notIdentifiableCanvasPx": null,
        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
        "delayedRecall": null
      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(10.00000 10.00000) scale(0.1562500)\"><path d=\"M256 512a256 256 0 1 0 0-512 256 256 0 1 0 0 512zm50.7-186.9L162.4 380.6c-19.4 7.5-38.5-11.6-31-31l55.5-144.3c3.3-8.5 9.9-15.1 18.4-18.4l144.3-55.5c19.4-7.5 38.5 11.6 31 31L325.1 306.7c-3.2 8.5-9.9 15.1-18.4 18.4zM288 256a32 32 0 1 0 -64 0 32 32 0 1 0 64 0z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "compass",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/compass.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
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            "basis": "spoken-word-count-rule"
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      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "clock",
            "cosine": 0.9595
          },
          {
            "id": "brain",
            "cosine": 0.9459
          },
          {
            "id": "circle",
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        ],
        "nearestAt16px": [
          {
            "id": "clock",
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          {
            "id": "circle",
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          },
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            "id": "cookie",
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        ],
        "nearestAt32px": [
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            "id": "circle",
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          {
            "id": "clock",
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          {
            "id": "cookie",
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      },
      "priorEstimates": {
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      "scores": {
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      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
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        "reviewerRanges": {
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          "pairwiseDistinctness": "reviewer-a: Clock and ball are round forms identified by small interior marks. | reviewer-b: Clock and ball also use a round boundary with inner marks.",
          "memorability": "reviewer-a: The diagonal needle gives a useful navigation cue. | reviewer-b: The directional needle gives a good but detail-dependent cue.",
          "familiarity": "reviewer-a: Compasses are commonly known through maps, outdoor use and interfaces. | reviewer-b: Compass imagery is common, with navigation experience affecting familiarity.",
          "shortNaming": "“compass” has 1 spoken word: ideal."
        },
        "aiConfusions": [
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          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(20.00000 10.00000) scale(0.1562500)\"><path d=\"M0 188.6C0 84.4 86 0 192 0S384 84.4 384 188.6c0 119.3-120.2 262.3-170.4 316.8-11.8 12.8-31.5 12.8-43.3 0-50.2-54.5-170.4-197.5-170.4-316.8zM192 256a64 64 0 1 0 0-128 64 64 0 1 0 0 128z\"/></g></svg>",
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            "library": "Font Awesome Free Solid",
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            "name": "location-dot",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/location-dot.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "location pin",
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            "wordCount": 2,
            "score": 4,
            "band": "good",
            "basis": "spoken-word-count-rule"
          }
        }
      ],
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          {
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          },
          {
            "id": "plug",
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        ],
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          {
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        ],
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          {
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          },
          {
            "reviewer": "reviewer-b",
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        ],
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    {
      "id": "musical-note",
      "label": "Musical note",
      "category": "music-play",
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        "name": "musical note",
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      "englishWordCount": 2,
      "priority": "test-first",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
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      "variants": [
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            "id": "envelope",
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          "pairwiseDistinctness": "reviewer-a: Flag also uses a pole and raised bar, but lacks the paired note heads. | reviewer-b: Its two low heads and tall connecting beam are distinctive here.",
          "memorability": "reviewer-a: The linked notes provide a strong music cue. | reviewer-b: The beamed-note form provides a strong sound association.",
          "familiarity": "reviewer-a: Musical-note symbols are widely familiar through media and interfaces. | reviewer-b: Music-note icons are broadly familiar.",
          "shortNaming": "“musical note” has 2 spoken words: good."
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      "assessment": {
        "aiReviewers": [
          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
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          "recognizability": 3,
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        },
        "reviewerRanges": {
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            3,
            3
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          "pairwiseDistinctness": [
            3,
            3
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            4,
            4
          ],
          "familiarity": [
            5,
            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The cylindrical rim and side marks read at 32 but shrink into a small vessel below. | reviewer-b: The top ellipse survives better than the tiny side supports. | Machine robustness 4.85/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Bowl and basket have related wide-top container silhouettes. | reviewer-b: Bowl and basket also have a broad oval top over a short vessel.",
          "memorability": "reviewer-a: The rim over a cylindrical body gives a useful percussion cue. | reviewer-b: The cylindrical body gives a good but detail-dependent instrument cue.",
          "familiarity": "reviewer-a: Drums are familiar instruments across many cultures. | reviewer-b: Drums are broadly familiar across cultures.",
          "shortNaming": "“drum” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "bowl",
          "basket"
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          "id": "drum",
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                "guitar": 1,
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              "stressAccuracy": 0.75,
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                "hand": 1,
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              "worstMargin": -0.10083
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          },
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          "minReliableCanvasPx": 7,
          "threshold": {
            "rule": "All8 stress cases correct at this size and every larger tested size. Tied best matches count as unresolved errors.",
            "minReliableCanvasPx": 7,
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            "justBelow": {
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      },
      "defaultRank": 90,
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    },
    {
      "id": "headphones",
      "label": "Headphones",
      "category": "music-play",
      "naming": {
        "name": "headphones",
        "language": "en",
        "wordCount": 1,
        "score": 5,
        "band": "ideal",
        "basis": "spoken-word-count-rule"
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      "preliminary": {
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        "englishNaming": 5,
        "pairwiseDistinctness": 4,
        "memorability": 4.5,
        "basis": "ai-screening-consensus"
      },
      "note": "Distinct arch and cups; compare with magnet and lock.",
      "englishWordCount": 1,
      "priority": "test-first",
      "confidence": {
        "assessment": "subjective AI screening with measured machine robustness",
        "crossCultural": "AI estimate, not population evidence"
      },
      "human": {
        "participants": 0,
        "recognitionBySize": null,
        "idealCanvasPx": null,
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        "notIdentifiableCanvasPx": null,
        "familiarityByGroup": null,
        "namingAgreementByLanguage": null,
        "voiceTransmissionAccuracy": null,
        "delayedRecall": null
      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(12.66667 10.00000) scale(0.1666667)\"><path d=\"M64 224c0-88.4 71.6-160 160-160s160 71.6 160 160l0 37.5c-10-3.5-20.8-5.5-32-5.5l-16 0c-26.5 0-48 21.5-48 48l0 128c0 26.5 21.5 48 48 48l16 0c53 0 96-43 96-96l0-160C448 100.3 347.7 0 224 0S0 100.3 0 224L0 384c0 53 43 96 96 96l16 0c26.5 0 48-21.5 48-48l0-128c0-26.5-21.5-48-48-48l-16 0c-11.2 0-22 1.9-32 5.5L64 224z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
            "version": "7.3.1",
            "name": "headphones",
            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/headphones.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "headphones",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
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        }
      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "map",
            "cosine": 0.8411
          },
          {
            "id": "camera",
            "cosine": 0.821
          },
          {
            "id": "bus",
            "cosine": 0.8208
          }
        ],
        "nearestAt16px": [
          {
            "id": "ball",
            "cosine": 0.7816
          },
          {
            "id": "map",
            "cosine": 0.7751
          },
          {
            "id": "compass",
            "cosine": 0.7728
          }
        ],
        "nearestAt32px": [
          {
            "id": "compass",
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          {
            "id": "map",
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          },
          {
            "id": "brain",
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        ]
      },
      "priorEstimates": {
        "recognizability": 4,
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      "scores": {
        "recognizability": 4.4,
        "pairwiseDistinctness": 4,
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      "assessment": {
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          {
            "reviewer": "reviewer-a",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
            "model": "gpt-6.1-sol",
            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-b.json"
          }
        ],
        "aiMeans": {
          "recognizability": 4,
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          "familiarity": 5
        },
        "reviewerRanges": {
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            4
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          "pairwiseDistinctness": [
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            4
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          "memorability": [
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          ],
          "familiarity": [
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            5
          ]
        },
        "criteriaReasons": {
          "recognizability": "reviewer-a: The arch and two broad ear cups remain readable at 16 under low contrast. | reviewer-b: The heavy ear pads remain useful, but the connecting arch weakens under stress. | Machine robustness 5.00/5 from 64 scored stress cases. A separate dense size sweep covers 152 stress cases; controls and extra size samples do not add ranking weight.",
          "pairwiseDistinctness": "reviewer-a: Magnet has a related horseshoe outline with the opening facing upward. | reviewer-b: Magnet has a related U shape with thick ends, though inverted.",
          "memorability": "reviewer-a: The paired cups on an arch give a good listening cue. | reviewer-b: The paired pads give a strong listening association.",
          "familiarity": "reviewer-a: Headphones are broadly familiar, especially among internet users. | reviewer-b: Headphones are broadly familiar, especially among internet users.",
          "shortNaming": "“headphones” has 1 spoken word: ideal."
        },
        "aiConfusions": [
          "magnet"
        ],
        "raster": {
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                "laptop": 2,
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        "crossCultural": "AI estimate, not population evidence"
      },
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        "participants": 0,
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      },
      "variants": [
        {
          "id": "fa-baseline",
          "label": "Font Awesome baseline",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\" fill=\"currentColor\" aria-hidden=\"true\"><g transform=\"translate(10.00000 10.00000) scale(0.1562500)\"><path d=\"M224 0c35.3 0 64 21.5 64 48 0 10.4-4.4 20-12 27.9-6.6 6.9-12 15.3-12 24.9 0 15 12.2 27.2 27.2 27.2l44.8 0c26.5 0 48 21.5 48 48l0 44.8c0 15 12.2 27.2 27.2 27.2 9.5 0 18-5.4 24.9-12 7.9-7.5 17.5-12 27.9-12 26.5 0 48 28.7 48 64s-21.5 64-48 64c-10.4 0-20.1-4.4-27.9-12-6.9-6.6-15.3-12-24.9-12-15 0-27.2 12.2-27.2 27.2L384 464c0 26.5-21.5 48-48 48l-56.8 0c-12.8 0-23.2-10.4-23.2-23.2 0-9.2 5.8-17.3 13.2-22.8 11.6-8.7 18.8-20.7 18.8-34 0-26.5-28.7-48-64-48s-64 21.5-64 48c0 13.3 7.2 25.3 18.8 34 7.4 5.5 13.2 13.5 13.2 22.8 0 12.8-10.4 23.2-23.2 23.2L48 512c-26.5 0-48-21.5-48-48L0 343.2c0-12.8 10.4-23.2 23.2-23.2 9.2 0 17.3 5.8 22.8 13.2 8.7 11.6 20.7 18.8 34 18.8 26.5 0 48-28.7 48-64s-21.5-64-48-64c-13.3 0-25.3 7.2-34 18.8-5.5 7.4-13.5 13.2-22.8 13.2-12.8 0-23.2-10.4-23.2-23.2L0 176c0-26.5 21.5-48 48-48l108.8 0c15 0 27.2-12.2 27.2-27.2 0-9.5-5.4-18-12-24.9-7.5-7.9-12-17.5-12-27.9 0-26.5 28.7-48 64-48z\"/></g></svg>",
          "source": {
            "library": "Font Awesome Free Solid",
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            "url": "https://github.com/FortAwesome/Font-Awesome/blob/7.3.1/svgs/solid/puzzle-piece.svg",
            "creator": "Fonticons, Inc.",
            "license": "CC-BY-4.0",
            "modifications": "Monochrome and normalized to an 80-unit longest ink edge in a 100-unit canvas; source geometry retained."
          },
          "naming": {
            "name": "puzzle",
            "language": "en",
            "wordCount": 1,
            "score": 5,
            "band": "ideal",
            "basis": "spoken-word-count-rule"
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      ],
      "automated": {
        "nearestAt8px": [
          {
            "id": "house",
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          {
            "id": "glove",
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          },
          {
            "id": "pizza",
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        ],
        "nearestAt16px": [
          {
            "id": "house",
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          {
            "id": "glove",
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          {
            "id": "star",
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        ],
        "nearestAt32px": [
          {
            "id": "house",
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          {
            "id": "circle",
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      },
      "priorEstimates": {
        "recognizability": 4,
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      },
      "scores": {
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        "pairwiseDistinctness": 4.5,
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        "shortNaming": 5
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          {
            "reviewer": "reviewer-a",
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            "method": "AI image-based screening with labeled pixel sheets",
            "source": "./assets/symbol-reviewer-a.json"
          },
          {
            "reviewer": "reviewer-b",
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        ],
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        },
        "reviewerRanges": {
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          "pairwiseDistinctness": [
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          ],
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          ],
          "familiarity": [
            4,
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          ]
        },
        "criteriaReasons": {
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          "pairwiseDistinctness": "reviewer-a: Its mix of projecting knobs and inward sockets has no close pool match. | reviewer-b: Plus shares the central cross-like mass after notches soften.",
          "memorability": "reviewer-a: The interlocking piece gives a strong solving cue. | reviewer-b: The interlocking tabs give a good problem-solving cue.",
          "familiarity": "reviewer-a: Jigsaw pieces are common through games and software imagery. | reviewer-b: Jigsaw-piece imagery is common in games and interfaces.",
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        },
        "aiConfusions": [
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  ]
}