Incidence of nondextrality in the NAS/NRC Twin Registry.
Genetic theories still flounder on the fact that similarity of hand preference is the same in monozygotic (MZ) and dizygotic (DZ) twins. Lateral preference on a well-designed set of 5 activities was obtained from 2,131 male pairs. On item analysis, only "throw" discriminated zygosity, attributable to "excess" nondextral MZ pairs. This item is remarkably free of the intense cultural bias against sinistrality.
Jaffe
J
J
Department of Psychiatry, College of Physicians and Surgeons of Columbia University, USA.
Ross
D
D
Anderson
S W
SW
Beebe
B
B
Squires-Wheeler
E
E
D000328:Adult; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D012042:Registries; D014427:Twins / Q000235:genetics*