E. Turkheimer et al., QUANTITATIVE-ANALYSIS OF GENDER DIFFERENCES IN THE EFFECTS OF LATERALIZED LESIONS ON VERBAL AND PERFORMANCE IQ, Intelligence, 17(4), 1993, pp. 461-474
Previous studies and meta-analyses have demonstrated that males have l
arger differences between Verbal IQ (VIQ) and Performance IQ (PIQ) fol
lowing unilateral brain lesions. Several theories have been proposed a
s an explanation of this finding, including a greater degree of functi
onal lateralization in males, gender differences in the organization o
f language centers within the left hemisphere, and differences in prob
lem-solving strategy for PIQ. We apply quantitative methods for analys
is of relations between lesion location and behavior to a sample of 64
males and females with unilateral brain lesions. Statistical tests co
nducted in LISREL-VII suggest that in females, a single model can desc
ribe the relationships between lesion location and VIQ and PIQ, with l
eft-hemisphere lesions producing more severe deficits on both measures
. In males, separate models of the relationships between lesion locati
on and VIQ and PIQ are required.