About the archive
Psychometrics Archive
A collection of intelligence tests you can take, examine, and trace to their sources. It brings historical examinations, modern archive editions, and open research measures together in one place.
What is in the collection?
Each test has a catalog entry explaining its format, origins, and subject matter, with links to source material. The collection covers verbal, numerical, and spatial reasoning, alongside memory, visual construction, and general knowledge. Its entries fall into three groups.
Historical examinations
Tests such as Army Alpha and the Otis Higher Examination reproduce published forms with their instructions and scoring rules. They let you work through the problems and see how those examinations were organized.
Archive editions
The General Reasoning Test and Cognitive Wonderlic-Style Quick Test follow established mixed-reasoning formats. Each uses the question set and score conversion provided for that online edition. They allow 30 minutes for 80 questions and 12 minutes for 50 questions, respectively.
Open research measures
ICAR-16 is the 16-item sample from the International Cognitive Ability Resource. It combines series, matrices, verbal reasoning, and three-dimensional rotation. Its reference percentile compares a score with participants in the published validation dataset.
Taking a test
Start with the catalog entry to check the time limit, format, and materials. Most tests can be completed independently in your browser. For example, the Army General Classification Test (AGCT) has 140 questions and a 40-minute limit; ICAR-16 is untimed.
Examiner-led entries work differently. The 1916 Stanford–Binet and Kohs Block Design provide guided records for someone administering the tasks, recording responses, and applying the scoring criteria. Read their directions before gathering materials or beginning.
Reading a result
A score depends on the questions, scoring rules, and comparison group. A historical IQ, an ICAR reference percentile, and an archive edition’s converted score have different foundations. The same number on two tests need not describe the same standing.
Browser controls, screen size, practice, and unsupervised timing can also change how a test is experienced. Historical norms describe the populations and periods in which they were developed; reproducing a form online does not create new population norms. The methodologies page explains the original administration and scoring methods in more detail.
Access and reports
You can take a test and see a free result preview. Where a percentile is available, the preview shows a percentile band. Full reports require a one-time payment, with the price shown before purchase. An emailed report link is included, and purchased reports are available from your dashboard. There is no subscription.
Browse the tests