LATERALITY AND INTELLECTUAL ABILITY: A JUST NOT NOTICEABLE DIFFERENCE?

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Abstract
SUMMARY. Previously reported work on laterality and intellectual abilities has suggested that the left‐handed may be divided into two populations. When right‐ and left‐handed are compared as groups on measures of intellectual performance, no differences are found. However, when children at the extreme lower end of the ability distributions are compared, a slight excess of left‐handed has been reported. The present study selected, from a population of 7688 children, those at the lower end of IQ, scholastic aptitude, and reading ability distributions and found no difference in the frequency of handedness for this subgroup. Left‐handed children are as likely to be at the upper end on an ability distribution as the lower end.

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