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ERIC Number: EJ799983
Record Type: Journal
Publication Date: 2008
Pages: 12
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0021-9924
Genetic and Environmental Influences on Early Speech, Language and Literacy Development
Hayiou-Thomas, Marianna E.
Journal of Communication Disorders, v41 n5 p397-408 Sep-Oct 2008
The genetic and environmental etiology of speech and broader language skills was examined in terms of their concurrent relationships in young children; their longitudinal association with reading; and the role they play in defining the "heritable phenotype" for specific language impairment (SLI). The work was based on a large sample of 4 1/2-year-old twins, who were assessed at home on a broad range of speech and language measures as part of the Twins Early Development Study. We found that genetic factors strongly influence variation in young children's speech in typical development as well as in SLI, and that these genetic factors also account for much of the relationship between early speech and later reading. In contrast, shared environmental factors play a more dominant role for broader language skills, and in relating these skills to later reading; isolated impairments in language as opposed to speech appear to have largely environmental origins. (Contains 4 figures.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A