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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 t...

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Bibliographic Details
Published in:Perceptual and motor skills 2003-06, Vol.96 (3), p.963-964
Main Authors: Jaffe, J., Ross, D., Anderson, S. W., Beebe, B., Squires-Wheeler, E.
Format: Article
Language:English
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Summary: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.
ISSN:0031-5125
1558-688X
DOI:10.2466/pms.2003.96.3.963