Construct validity of Wechsler factor scores

The construct validity of the Verbal Comprehension, Perceptual Organization , and Freedom from Distractibility factor scores was examined in a sample o f school-aged referred children. Examination of correlations between factor scores and neuropsychological and achievement tests generally supported th e construct validity of the factors. The Verbal Comprehension factor was as sociated with verbal, quantitative, and concept-formation abilities. The Pe rceptual Organization factor was related to nonverbal concept formation, ta ctual performance, and visual attention. The Freedom from Distractibility f actor demonstrated a complex pattern of correlations and appeared to reflec t a range of abilities including quantitative, language, attentional, and c oncept formation.