| Literature DB >> 12220052 |
Essi Colledge1, Dorothy V M Bishop, Gesina Koeppen-Schomerus, Thomas S Price, Francesca G E Happé, Thalia C Eley, Philip S Dale, Robert Plomin.
Abstract
Normal language development was studied in 310 pairs of 4-year-old twins born in the United Kingdom in 1994. Twins were assessed individually in their homes on a diverse battery of language and nonverbal measures. Rotated factor analyses indicated the presence of a general Language factor (L) as well as a general Nonverbal (NV) factor. Moderate genetic influence was found for both L and NV abilities. Bivariate genetic analysis estimated a genetic correlation of .63 between L and NV abilities, implying that over half of the genetic influence on L overlaps with genetic influence on NV. These results suggest that at age 4, genetic influences on individual differences in language overlap substantially with genetic influences on individual differences in other cognitive abilities, although perhaps less so than later in development.Mesh:
Year: 2002 PMID: 12220052 DOI: 10.1037//0012-1649.38.5.749
Source DB: PubMed Journal: Dev Psychol ISSN: 0012-1649