Frequency of WISC–III and WAIS–R pairwise subtest differences.

Despite their psychometric shortcomings, pairwise Wechsler Intelligence Scale for Children—Third Edition (WlSC-III; D. Wechsler, 1991) and Wechsler Adult Intelligence Scale—Revised (WAIS–R; D. Wechsler, 1981) subtest 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 neuropsychological instruments. The authors used WISC–III and WAIS–R standardization sample data to derive frequency tables for all pairwise subtest comparisons. The authors present tables of the difference values necessary to be equal to or less than the 1st, 5th, and 15th percentiles for all pairwise difference scores; discuss caveats for their use; and provide clinical examples for their application. (PsycINFO Database Record (c) 2010 APA, all rights reserved)