Longitudinal dichotic listening patterns for aphasic patients : III. Relationship to language and memory variables

Longitudinal dichotic scores were obtained for aphasic patients for whom extensive language and memory data were also available. Severity of language impairments was related to ear advantage, but this occurred because larger lesions yielded more severe language impairments and were more likely to involve Heschl's gyrus. Extent of language recovery was not related to changes in ear dominance. Relationships that occurred generally supported a functional-anatomical interpretation which stressed the importance of the integrity of the posterior superior temporal lobe to performance both on dichotic tests and on specific language or memory tests.     

Longitudinal dichotic listening patterns for aphasic patients : II. Relationship with lesion variables

Dichotic listening scores and information on lesion size and location were obtained for aphasic patients. All patients had a reduction in dichotic scores at 1 month postonset of symptoms, but some patients returned to normal levels of performance by 6 months postonset. Lesion location was the main determinant of patterns of performance. Right ear scores from the dichotic digit test closely reflected the presence or absence of lesions involving Heschl's gyrus. What appeared to be an effect of lesion volume was confounded by the relationship between increasing lesion volume and a greater likelihood of damage to Heschl's gyrus.     

Gender differences in variability in intellectual abilities: A cross-cultural perspective

A cross-cultural quantitative review of contemporary findings of gender differences in variability in verbal, mathematical, and spatial abilities was conducted to assess the generalizability of U.S. findings that (a) males are more variable than females in mathematical and spatial abilities, and (b) the sexes are equally variable in verbal ability. No consistent gender differences (variance ratios) were found across countries in any of the three broad ability domains. Instead, males were more variable than females in some nations and females were more variable than males in other nations. Thus, the well-established U.S. findings of consistently greater male variability in mathematical and spatial abilities were not invariant across cultures and nations.I would like to thank Robert Linn for providing me with the British norms for the Differential Aptitude Tests and Julian Stanley for his comments on a draft of this article.