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Genetic Effects on Children's Conversational Language Use
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- Author(s): DeThorne, Laura S.; Petrill, Stephen A.; Hart, Sara A.
- Language:
English- Source:
Journal of Speech, Language, and Hearing Research. Apr 2008 51(2):423-435.- Physical Description:
PDF- Publication Date:
2008- Document Type:
Journal Articles
Reports - Research - Language:
- Additional Information
- Availability: American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail: [email protected]; Web site: http://www.asha.org/about/publications/journal-abstracts/jslhr/
- Peer Reviewed: Y
- Source: 13
- Subject Terms:
- Accession Number: 10.1044/1092-4388(2008/031)
- ISSN: 1092-4388
- Abstract: Purpose: The present study examined the extent of genetic and environmental influences on individual differences in children's conversational language use. Method: Behavioral genetic analyses focused on conversational measures and 2 standardized tests from 380 twins (M = 7.13 years) during the 2nd year of the Western Reserve Reading Project (S. A. Petrill, K. Deater-Deckard, L. A. Thompson, L. S. DeThorne, & C. Schatschneider, 2006) Multivariate analyses using latent factors were conducted to examine the extent of genetic overlap and specificity between conversational and formalized language. Results: Multivariate analyses revealed a heritability of 0.70 for the conversational language factor and 0.45 for the formal language factor, with a significant genetic correlation of 0.37 between the two factors. Specific genetic effects were also significant for the conversational factor. Conclusions: The current study indicated that over half of the variance in children's conversational language skills can be accounted for by genetic effects with no evidence of significant shared environmental influence. This finding casts an alternative lens on past studies that have attributed differences in children's spontaneous language use to differences in environmental language exposure. In addition, multivariate results generally support the context-dependent construction of language knowledge, as suggested by the theory of activity and situated cognition (J. S. Brown, A. Collins, & P. Duguid, 1989; T. A. Ukrainetz, 1998), but also indicate some degree of overlap between language use in conversational and formalized assessment contexts.
- Abstract: Author
- Publication Date: 2008
- Accession Number: EJ789702
- Availability:
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