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6 left-handed females scored significantly below 60 right-handed females on a test of spatial visualization (p less than .005). 13 left-handed males showed a higher mean score than 33 right-handed males on the spatial test, although this difference was not statistically significant. These results are consistent with the hypothesis that the left cerebral hemisphere is of greater relative importance to spatial functioning in females than males.
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Mark G. McGee (1976) studied this question.
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