A comparison of laterality indices in college and retarded subjects.
The relation of laterality to intelligence was assessed by administration of Berman's ICD (Index of Cerebral Dominance) to 20 male and female college students and 20 retarded Ss (IQs 33-75) of comparable age and sex. The college Ss were more lateralized in hand, foot, ear, and eye, but it was primarily foot lateralization that distinguished the groups, despite the fact that hand was the most lateralized subsystem in both groups. While these results are not entirely consistent with Berman's, they are generally confirmatory of a positive relation of laterality and intelligence.
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