Adaptive English Vocabulary Test Goes Viral, Calibrated on 499 US Adults

MostlyMonkey · x · 2026-09-27

An adaptive version of Kirkegaard's (2024) open-source English vocabulary test: 108 items deliberately using rare words to probe the top of the vocabulary range, with items chosen adaptively to match your estimated level (25-30 questions, 5-8 minutes). Scores are reported as IQ relative to White US adults of your age, calibrated on 499 Prolific-recruited US adults in 2023.

Related event: Adaptive English Vocabulary Test Launches, Convertible to IQ Score(3 posts)→

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