Kohs block design test

[2] The test was developed in 1920 by psychologist Samuel C. Kohs (1890–1984), a student of Lewis Terman,[3] building on earlier and similar designs (such as Francis N. Maxfield's Color Cube Test).

[5] The initial scores were based on completion time and number of moves.

[9][10] This has made the Kohs Block Test useful for assessing the effects of aging,[11] drug use,[12] and in brain research,[13] among other areas.

In particular, that the Kohs is a relatively non-verbal test lends it to be used effectively in assessment of those with language issues and in multicultural research settings to reduce the impact of language on assessment of functioning.

Patients with damage to the right hemisphere of the brain find successful completion of the task to be extremely difficult, so the test is often used to diagnose right hemisphere damage.