Abstract
Patterns of performance on the Wechsler Individual Achievement Test (WIAT) were examined in a heterogeneous neuropsychological sample of 298 children aged 6 to 16 years. Cluster analysis was applied to a split-half sample of selected WIAT subtests to examine the sample for underlying patterns of academic performance. Four distinct and reliable WIAT pattern subtypes were identified. These subtypes included (1) global academic deficits, (2) better performance on tasks of mathematical ability relative to reading and spelling, (3) better performance on tasks of reading and spelling relative to mathematics, and (4) average performance on all tasks. These WIAT subtypes had been previously reported in cross-cultural literature, utilizing clinical and statistical methodologies with the Wide Range Achievement Test (WRAT) (e.g., van der Vlugt & Satz, 1985).
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