A multivariate twin study of early literacy in Japanese kana

Keiko Fujisawa, Sally J. Wadsworth, Shinichiro Kakihana, Richard K. Olson, John C. DeFries, Brian Byrne, Jyukou Andou

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This first Japanese twin study of early literacy development investigated the extent to which genetic and environmental factors influence individual differences in prereading skills in 238 pairs of twins at 42. months of age. Twin pairs were individually tested on measures of phonological awareness, kana letter name/sound knowledge, receptive vocabulary, visual perception, nonword repetition, and digit span. Results obtained from univariate behavioral-genetic analyses yielded little evidence for genetic influences, but substantial shared-environmental influences, for all measures. Phenotypic confirmatory factor analysis suggested three correlated factors: phonological awareness, letter name/sound knowledge, and general prereading skills. Multivariate behavioral genetic analyses confirmed relatively small genetic and substantial shared environmental influences on the factors. The correlations among the three factors were mostly attributable to shared environment. Thus, shared environmental influences play an important role in the early reading development of Japanese children.

Original languageEnglish
Pages (from-to)160-167
Number of pages8
JournalLearning and Individual Differences
Volume24
DOIs
Publication statusPublished - 2013 Apr

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twin studies
Behavioral Genetics
Twin Studies
Names
literacy
Visual Perception
Vocabulary
Child Development
Individuality
Statistical Factor Analysis
Reading
visual perception
heredity
environmental factors
factor analysis
vocabulary
Literacy
evidence

Keywords

  • Behavioral genetics
  • Early literacy
  • Japanese kana syllabary

ASJC Scopus subject areas

  • Social Psychology
  • Developmental and Educational Psychology
  • Education

Cite this

A multivariate twin study of early literacy in Japanese kana. / Fujisawa, Keiko; Wadsworth, Sally J.; Kakihana, Shinichiro; Olson, Richard K.; DeFries, John C.; Byrne, Brian; Andou, Jyukou.

In: Learning and Individual Differences, Vol. 24, 04.2013, p. 160-167.

Research output: Contribution to journalArticle

Fujisawa, Keiko ; Wadsworth, Sally J. ; Kakihana, Shinichiro ; Olson, Richard K. ; DeFries, John C. ; Byrne, Brian ; Andou, Jyukou. / A multivariate twin study of early literacy in Japanese kana. In: Learning and Individual Differences. 2013 ; Vol. 24. pp. 160-167.
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