The present investigation compared the WAIS (N = 39) and WAIS-R (N = 35) IQs of two groups of college undergraduates (aged 17 to 22) judged to be comparable in aptitude as measured by ACT scores. The WAIS-R IQs were found to be significantly lower than the WAIS IQs and approximate those reported by Wechsler for a group aged 35 to 44. The WAIS/WAIS-R differences have important implications in the use of these tests in school and clinical settings. Correlations of the WAIS and the WAIS-R IQs with the Composite and the subscale scores of the ACT indicate that the WAIS-R IQs are more congruent with ACT test results than WAIS IQs.
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Matarazzo, J. D. (1972). Wechsler's measurement and appraisal of adult intelligence (5th ed.). Baltimore: Williams & Wilkins.
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