Comparability of WISC and WISC-R scores among borderline and mildly retarded children.

The comparability of WISC and WISC-R IQ scores was studied in a sample of 48 mildly retarded and borderline children. All WISC-R and WISC IQ and subtest scores were found to be related significantly, but not directly comparable. Generally, the WISC-R yielded lower scores with the exceptions of the Performance IQ score and the PC, PA, and OA subtest scores. Subtest patterning on the WISC-R for this group was similar to previously reported data on the WISC. Caution was suggested in making direct comparisons of WISC and WISC-R scores, at least within the ability range studied.