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 = 20 0 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 consisten t across the age range of the WISC-III: Verbal Comprehension, Perceptu al Organization, and Freedom from Distractibility. The results of the study are discussed in terms of their clinical utility with useful sta tistics for the interpretation of the WISC-III presented.