Thirty-five medical students were administered one of two combination forms of the Wechsler Adult Intelligence Scale (WAIS) and the WAIS-Revised (R) in a single session, with the WAIS and WAIS-R components presented in a counterbalanced order using a procedure that avoided the repetition of identical items. The WAIS IQ scores were higher than were the WAIS-R scores. The following tendency was noted: The higher the WAIS Full Scale IQ, the smaller the Full Scale IQ difference between the two tests. Unexpectedly, the Verbal minus Performance discrepancy was found to be greater on the WAIS-R than on the WAIS.
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