Base rates of the wais-r intersubtest scatter and viq-piq discrepancy in normal elderly

Abstract

This study provides base rates for WAIS‐R VIQ‐PIQ discrepancy and for 3 indices of intersubtest scatter in a sample of high functioning normal elderly. High correlations between indices of scatter, such as (1) range of scatter; (2) Profile Variability Index; and (3) number of subtest scores that significantly deviated from the individual's own mean, indicate that easy‐to‐compute range can be used as an adequate measure of scatter in many clinical settings. The results suggest that bright elderly individuals display a large degree of scatter. The clinician should base judgment regarding abnormality of the WAIS‐R indices on the rarity of the value demonstrated by the individual with respect to the sample of comparable age and intelligence level.

Intellect declines in healthy elderly subjects and cerebellum

“…Scores of performance intelligence scale were strongly and significantly decreased with age. This finding is compatible with the results of several previous studies of intelligence in the aging process 5,32,33 . In addition, scores of performance intelligence scale positively correlated with right cerebellum in which gray matter densities decreased with aging.…”