Factor structure of the Wechsler Adult Intelligence Scale-Revised

The standardization data for the WAIS-R and the original WAIS were subjected to principal-factor analysis, and a 2-factor solution was adopted for each scale. The stability of the 2 factors, identified as Verbal Comprehension and Perceptual Organization, was high both within and between scales. Variance components (common, specific, and error) and estimates of the general factor were calculated for each subtest on both the WAIS-R and the WAIS. Results are discussed in terms of the clinical interpretation of the scales. (17 ref)