A meta-analysis of sex differences in the effects of unilateral brain damage on intelligence test results.

Linear regression analyses were used to examine 16 studies on the effect of unilateral brain damage on WAIS IQ. Although only 2 of these studies had originally been designed to investigate sex differences, analyses revealed that the proportions of males and females tested had affected the overall outcome. A greater preponderance of men in either the left- or right-lesion groups was associated with larger test-specific deficits in the Verbal and the Performance Scales, respectively. Left-lesioned women showed an impairment on both scales, perhaps because women may use left-hemisphere processing to solve both verbal and ostensibly nonverbal problems. (French abstract) (40 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)