COMPARATIVE 3-FACTOR SOLUTIONS OF THE WISC-III AND WISC-R AT 11 AGE LEVELS BETWEEN 6-1/2 AND 16-1/2 YEARS

The Wechsler Intelligence Scale for Children, Third Edition (WISC-III) was factor analyzed at ages 6 1/2 through 16 1/2 years of age (n = 200 per age group). The study replicated analyses conducted by Kaufman (1975) with the WISC-R using comparable subtests across the two scales. As in the WISC-R study, a three-factor structure emerged as consistent across the age range of the WISC-III: Verbal Comprehension, Perceptual Organization, and Freedom from Distractibility. The results of the study are discussed in terms of their clinical utility with useful statistics for the interpretation of the WISC-III presented.