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Comparison of IQs and Verbal-Performance IQ Discrepancies Estimated from Two Seven-Subtest Short Forms of the WAIS-R

Centre for Magnetic Resonance, University of Queensland, Australia

Glen Smith

University of Queensland, Australia

Deborah Anderson

Royal Brisbane Hospital, Queensland, Australia

The present study compared IQs and Verbal-Performance IQ discrepancies estimated from two seven-subtest short forms of the Wechsler Adult Intelligence Scale-Revised (WAIS-R) in a sample of 100 subjects referred for neuropsychological assessment. The short forms of Warrington, James, and Maciejewski (1986) and Ward (1990) yielded similar correlation coefficients and absolute error rates with respect to WAIS-R IQs, although the Warrington short form requires more time to administer and score. Both short forms were able to detect significant Verbal-Performance IQ discrepancies 70% of the time. However, they incorrectly yielded significant discrepancies for approximately 25% of the sample who did not have significant differences on the full WAIS-R. The results do not support reporting and interpreting significant Verbal-Performance IQ discrepancies estimated from these short forms.

Journal of Psychoeducational Assessment, Vol. 14, No. 2, 121-130 (1996)
DOI: 10.1177/073428299601400203


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