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Factor analysis of the WAIS-R at nine age levels between 16 and 74 years

Factor analysis of the WAIS-R at nine age levels between 16 and 74 years


The WAIS-R was factor analyzed across the 9 age groups in the standardization sample (1,880 Ss). When 3- and 4-factor analyses were performed, the familiar 3-factor structure (Verbal Comprehension, Perceptual Organization, and Freedom From Distractibility) was clearly visible. Findings indicate that the individual subtests seem to play equivalent roles in the WAIS and WAIS-R, with the possible exception of Picture Arrangement, which no longer loads highly on factors other than General Intelligence. (8 ref)
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