Genetic and environmental structure of individual differences in hand, foot, and ear preferences: A twin study

Kunitake Suzuki, Juko Ando

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Recent studies with large sample size have reported moderate heritability of hand preference. However, little is known about genetic and environmental factors for lateral preference. We examined the genetic and environmental factors for hand, foot, and ear preferences using a twin design study. A lateral preference questionnaire was administered to twin participants (N=956). Phenotypic correlation matrices of lateral preferences were computed for monozygotic and dizygotic twin pairs, and were subjected to Cholesky decomposition to compute additive genetic and unique environmental correlation matrices. Promax rotation factor analysis of each genetic and environmental correlation matrix yielded six genetic and four environmental factors. Factor-loading patterns for these factors indicated that hand and foot lateral activities were affected by different genetic factors. By contrast, each of the four environmental factors was mainly associated with hand, foot, or ear preference. These results suggest that the genetic structure for lateral preference may be more complex than the environmental structure. In particular, hand preference may be multidimensional in terms of genetic factors.

本文言語English
ページ(範囲)113-128
ページ数16
ジャーナルLaterality
19
1
DOI
出版ステータスPublished - 2014 1月

ASJC Scopus subject areas

  • 人文科学(その他)
  • 心理学一般

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