The factor structure of the Wechsler Adult Intelligence Scale vs the Wechsler Adult Intelligence Scale—Revised was examined using two samples of 198 and 276 neuropsychiatric patients. Results of two- and three-factor principal factor solutions with varimax rotations were compared across test forms. Results supported comparable two-factor models for both scales. The third factor, Freedom From Distractibility, accounted for a small percentage of the total variances. Composition of the third factor was inconsistent between samples, calling into question the clinical and theoretical utility of this construct.
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