A comparison of the intertest accuracy of two short forms of the WAIS-R

The relative efficacy of two short forms of the WAIS-R with respect to accurate subtest profile scatter was examined (N = 50). The subtest scores of both the split-half Satz-Mogel (S-M) short form and the criterion referenced Modified WAIS-R (WAIS-RM) short form were found to differ significantly from full length WAIS-R subtest scores. Direct comparison of the S-M to the WAIS-RM showed the WAIS-RM to provide a closer approximation of full length WAIS-R subtest variability. Therefore, selection of the appropriate WAIS-R short form is best guided by the extent to which accuracy of inter-subtest variability is needed.