WAIS-III VIQ–PIQ and VCI–POI Discrepancies in Lateralized Cerebral Damage

Abstract

We evaluated Verbal IQ (VIQ)–Performance IQ (PIQ) and Verbal Comprehension Index (VCI)–Perceptual Organization Index (POI) discrepancies among 16 patients with right-sided and 20 with left-sided cerebral lesions. Means for age and education among left hemisphere-damaged patients were 46.25 years (SD = 17.42) and 12.17 years (SD = 2.87). Means and standard deviations for age and education were 47.86 years (SD = 16.83) and 12.27 years (SD = 2.46) for those with right-sided damage. Left hemisphere lesions produced nonsignificant VIQ < PIQ and VCI < POI means, whereas right hemisphere damage resulted in significant VIQ > PIQ and VCI > POI mean discrepancies. Additional analyses indicated that neither discrepancy score was effective in identifying lateralized brain damage.

Keywords:

• discrepancy scores
• lateralized cerebral lesions
• VCI–POI
• VIQ–PIQ
• WAIS-III