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Association between familial sinistrality and pathological left-handedness: a comparison of mentally retarded and
A Searleman1, T F Cunningham, W Goodwin
1Dept. of Psychology, St. Lawrence University, Canton, NY 13617.
Abstract:
The hypothesis that familial sinistrality (FS) might be a useful variable for differentiating between pathological and natural left-handers was explored. A comparison of the incidence of FS in mentally retarded and nonretarded samples indicated that a positive history of familial sinistrality (FS+) was significantly more likely to occur in mildly retarded individuals. In addition, left-handed retarded people, in general, were significantly more likely to be FS+ than were right-handed retarded people.
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