Statistically inferred vs. Empirically observed VIQ-PIQ differences in the WAIS-R

Abstract

A discussion on the distinction between statistically significant Verbal-Performance IQ discrepancies and the frequencies with which such differences occur in the WAIS-R standardization sample is presented. An example is provided to aid in the determination of Wechsler Verbal-Performance IQ frequency data, and comparisons are made between statistically derived and empirically observed WAIS-R Verbal-Performance IQ frequencies. Implications for placing additional emphasis upon evaluating Verbal versus Performance IQ frequencies are delineated.