Relative usefulness of elevation, variability, and shape information from WISC—R, K-ABC, and Fourth Edition Stanford-Binet profiles in predicting achievement.

Scatter analysis of IQ profiles has a long and controversial history. The study was conducted to determine whether the validity of scatter information is any greater for 2 new IQ batteries, the Kaufman Assessment Battery for Children (K-ABC) and the Fourth Edition Stanford-Binet Intelligence Scale (SB4), than for the Wechsler Intelligence Scale for Children—Revised (WISC—R). Within a sample of referred children, numerical indexes were computed of profile elevation, shape, and variability for all IQ tests. Using hierarchical multiple regression with achievement scores as dependent variables, shape information was found that had marginal incremental validity over elevation as a predictor for the WISC—R, even less for the SB4, and virtually none for the K-ABC. Implications of these results are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)