Observed arrival · 2026-09-09
A History of Intelligence Tests
A curated archive of public-domain IQ tests that pairs historical context and source material with online assessments.
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The archive organizes ten assessments by historical source, administration style, item count, duration, and tested abilities. Examples include the 75-item Otis Higher Examination, the 16-item ICAR-16, and Army Alpha, Form 5 with 212 items across eight sections. The homepage offers free previews and lists a $10 one-time charge for full reports, including an emailed copy; it does not describe those reports as subscriptions.
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