A critical analysis of the Otis self-administering test of mental ability—higher form

Abstract

When a 30 min. period is allowed for taking the Otis self-administering test of mental ability nearly 40% of the subjects complete the test. When only 20 min. are allowed, this figure is reduced to 10%. The items are not properly arranged in order of difficulty for adult subjects, and an excessive number of them are inadequate in their discriminative power. Many supposedly comparable items in the various forms of the test are not of equal difficulty. An abridged and restandardized adaptation of the test is in preparation. (PsycInfo Database Record (c) 2025 APA, all rights reserved)