This study classified subgroups of learning disabled (LD) children while considering the effects of age. Specifically, scores on the Halstead-Reitan Neuropsychological Battery (HRNB) for older children, the Wechsler Intelligence Scale for Children-Revised (WISC-R), and Wide Range Achievement Test (WRAT) were clustered for a large sample of public school LD children at the age levels 9-10, 11-12, and 13-14 years old. Like clusters were then identified and collapsed across age groups. Discriminant analyses were performed at each age level, and for like clusters across ages as a measure of predictive validity. Results of this study suggested two distinct clusters at each age level; one showing diffuse deficits which varied little with age, and the other evidencing specific neuropsychological problems which may vary with age.
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