{
  "title": "BrainiLab: first 200 completed recorded games",
  "checked_on": "2026-10-23",
  "period_utc": {
    "from": "2026-08-28T23:17:03.86+00:00",
    "through": "2026-10-18T10:42:54.91127+00:00"
  },
  "selection": "First 200 completed game sessions with a recorded result, ordered by completion time and a stable tie-break. Snapshot checked 23 October 2026.",
  "recorded_rounds": 200,
  "excluded_administration_account_rounds": 102,
  "excluded_other_unverified_rounds": 8,
  "eligible_verified_rounds": 90,
  "comparison_minimum_rounds": 10,
  "comparison": [
    {
      "game": "Math Rush",
      "rounds": 16,
      "correct_answers": 283,
      "counted_answers": 308,
      "answer_accuracy_percent": 91.9
    },
    {
      "game": "World Flags",
      "rounds": 12,
      "correct_answers": 199,
      "counted_answers": 240,
      "answer_accuracy_percent": 82.9
    },
    {
      "game": "Science Quiz",
      "rounds": 16,
      "correct_answers": 216,
      "counted_answers": 320,
      "answer_accuracy_percent": 67.5
    }
  ],
  "science_easy": {
    "rounds": 4,
    "correct_answers": 74,
    "counted_answers": 80,
    "answer_accuracy_percent": 92.5
  },
  "method": "Sum of verified correct answers divided by sum of verified counted answers; round to one decimal place. Repeated rounds count separately. The three comparison games account for 44 of the 90 eligible rounds.",
  "limitations": [
    "Only completed recorded rounds; not visits or unfinished games.",
    "Different players, question sets, difficulties and game rules; not matched tests.",
    "Known administration accounts excluded; other test accounts may remain.",
    "Math Rush skips excluded from its answer denominator.",
    "Versions changed during the period; most eligible Math Rush rounds use its newer scoring version.",
    "Self-selected small sample; not evidence of population abilities, learning gains or intelligence."
  ],
  "privacy": "Aggregates only; no player names, identifiers, contact details or individual results."
}