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- Title
Common aetiology for diverse language skills in 4½-year-old twins.
- Authors
Hayiou-Thomas, Marianna E.; Kovas, Yulia; Harlaar, Nicole; Plomin, Robert; Bishop, Dorothy V. M.; Dale, Philip S.
- Abstract
Multivariate genetic analysis was used to examine the genetic and environmental aetiology of the interrelationships of diverse linguistic skills. This study used data from a large sample of 4½-year-old twins who were tested on measures assessing articulation, phonology, gram- mar, vocabulary, and verbal memory. Phenotypic analysis suggested two latent factors: articulation (2 measures) and general language (the remaining 7), and a genetic model incorporating these factors provided a good fit to the data. Almost all genetic and shared environmental influences on the 9 measures acted through the two latent factors. There was also substantial aetiological overlap between the two latent factors, with a genetic correlation of 0.64 and shared environment correlation of 1.00. We conclude that to a large extent, the same genetic and environmental factors underlie the development of individual differences in a wide range of linguistic skills.
- Subjects
LINGUISTICS; LANGUAGE &; languages; MULTIVARIATE analysis; CHILDREN'S language; PHONOLOGY; VERBAL ability; VOCABULARY; PHENOTYPES; GENOTYPE-environment interaction
- Publication
Journal of Child Language, 2006, Vol 33, Issue 2, p339
- ISSN
0305-0009
- Publication type
Article
- DOI
10.1017/S0305000906007331