40 patients at a psychiatric hospital were tested with the following tests of intelligence: Wechsler Adult Intelligence Scale (WAIS), Raven's Progressive Matrices (PM) and Forms A and B of the Full-Range Picture Vocabulary Test (FRPV). Regression analysis using the WAIS as the criterion and the other two tests as predictors indicated that either Form A or Form B of the FRPV predicted WAIS IQ but the PM did not.
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