Relationships between Wechsler-Bellevue Form I and Wais Performances of Subjects with Longstanding Cerebral Dysfunction

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Abstract
Wechsler-Bellevue I and WAIS results were compared for 179 Ss with long-standing cerebral dysfunction. Although highly significant rs were obtained between the two scales, mean intra-individual differences were significant on 9 of the 14 measures studied, clearly demonstrating the lack of equivalence of the two scales, at least for this sample. Rank orders of difficulty of the subtests also were not comparable. The results were interpreted as precluding the plausibility of pooling results from the two scales. Additional studies need to be done with the newer instrument to determine the applicability of earlier findings with the W-B I with respect to differential ability deficits found among Ss with cerebral dysfunction.