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January 1980

Season of Birth of Left-Handers-Reply

Author Affiliations

The Children's Hospital Medical Center 300 Longwood Ave Boston, MA 02115

Arch Neurol. 1980;37(1):63-64. doi:10.1001/archneur.1980.00500500093021

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In Reply.—  In an earlier, longer draft of our report, we included a table of our "raw" data. We deleted it because we thought very few people would want to see these data. To date, Dr McManus is the only person who has expressed such an interest. Since his request is a public one, we respond by including the table of these data (Table 2).Several reasons may be offered to explain why Dr McManus' findings do not agree with ours. First, not all schoolgirls become college undergraduates. The selection process may tend to exclude those girls whose lefthandedness reflected the influence of factors associated with season of birth. For example, girls with "pathological left-handedness" may be more likely to display cognitive and/or perceptual dysfunction than are girls who do not have "pathological lefthandedness." In light of such a possibility, we are reluctant to view elementary-school pupils and University of Cambridge undergraduates

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