43 psychiatric outpatients of varying diagnoses were given a battery of tests, i.e., a Circle Discrimination Test, Tone Discrimination Test, Gottschaldt Embedded-figures Test, Paired Associates, and a Concept Shift Test. Scores derived from these 5 tests, plus age and IQ (13 variables) were intercorrelated and factor analyzed to establish the dimensions of learning and perceptual and conceptual performance for these psychiatric outpatients. The 5 orthogonal factors obtained were named: discrimination, rapid concept-shift adaptation, learning-reasoning, older age-high intelligence, and slow concept-shift adaptation.
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