Volume 19, Issue 4 (1990)
Patterns and Prevalence of Core Profile Types in the WPPSI Standardization Sample
Joseph J. Glutting, Paul A. McDermott
The most representative subtest profiles were found for the 1,200 children comprising the standardization sample of the Wechsler Preschool and Primary Scale of Intelligence (WPPSI; Wechsler, 1967). The primary benefit of such a core profile typology is that it provides necessary contrasts for testing hypotheses about whether children’s profiles are descriptively or clinically unique. Scaled scores from WPPSI subtests were grouped according to similar level and shape using sequential minimum-variance cluster analysis with independent replications. A final solution of six core profile types met all formal heuristic and statistical criteria. Results are discussed in the context of leading research on the correlates of children’s abilities. Thereafter, two methods are presented for determining the relative uniqueness of WPPSI subtest patterns: the first is mathematically precise and the second is more convenient to every day practice. A step-by-step worksheet is provided for the “everyday” method and a case study is analyzed using this procedure.
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