Association between familial sinistrality and pathological left-handedness: a comparison of mentally retarded and nonretarded subjects.
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.
Searleman
A
A
Dept. of Psychology, St. Lawrence University, Canton, NY 13617.
Cunningham
T F
TF
Goodwin
W
W
D000293:Adolescent; D000328:Adult; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics / Q000503:physiopathology*; D007360:Intelligence