Compared the subtest and IQ scores obtained by a sample of 75 learning disabled and retarded children and youth (50 boys, 25 girls) on the WISC‐R after a 2‐year time interval. Stability coefficients (test‐retest) were obtained for the sample. The evidence obtained from the present study indicated that the WISC‐R provides stable full‐scale IQs.

Investigated the performance of learning‐disabled (LD) and behaviordisorder (BD) children and youth on the WISC‐R. A stepwise discriminant function analysis and chi‐square analysis were used to analyze the performance of 135 children and youth (83 males, 52 females) on the WISC‐R. The sample consisted of 68 LD and 67 BD Ss, whose ages ranged from 81‐1 month to 168‐6 months with a mean age of 123‐1 months. Results suggest that discriminant function analysis can be useful as one criterion in differentiating LD children from BD children. Implications are discussed.