Page:Kohs-Block-Design tests-1920.pdf/5

Chart 1. Block Designs.

Designs: 1, 2, 3, 4, 5, 6, 7, 8, 9—4 blocks.

Designs: 10, 11—9 blocks.

Designs: 12, 13, 14, 15, 16, 17—16 blocks.

Colors (Windsor & Newton, Ltd.): red = carmine lake; blue = prussian blue; yellow = pale cadmium.

To perform the test, utilizing twenty designs, one averaged about an hour or an hour and a half. In the final revision three designs have been eliminated, leaving seventeen, thus decreasing somewhat the time necessary to apply the tests with no significant decrease of reliability. The criteria for rejection were based on correlations with those arrays of evidence presuming to yield an index of intelligence, such as is