FREQUENCY OF WISC-III AND WAIS-R PAIRWISE SUBTEST DIFFERENCES

Despite their psychometric shortcomings, pairwise Wechsler Intelligenc e Scale for Children-Third Edition (WISC-III; D. Wechsler, 1991) and W echsler Adult Intelligence Scale-Revised (WAIS-R; D. Wechsler, 1981) s ubtest scaled score comparisons can be important in neuropsychological evaluations (M. D. Lezak, 1995), an endeavor in which hypotheses from pairwise comparisons can be tested with independent neuropsychologica l instruments. The authors used WISC-III and WAIS-R standardization sa mple data to derive frequency tables for all pairwise subtest comparis ons. The authors present tables of the difference values necessary to be equal to or less than the 1st, 5th, and 15th percentiles for all pa irwise difference scores; discuss caveats for their use; and provide c linical examples for their application.