ERIC Number: EJ858868
Record Type: Journal
Publication Date: 2009-Nov
Abstractor: As Provided
Reference Count: 0
Genetic Architecture of Verbal Abilities in Children and Adolescents
Hoekstra, Rosa A.; Bartels, Meike; van Leeuwen, Marieke; Boomsma, Dorret I.
Developmental Science, v12 n6 p1041-1053 Nov 2009
The etiology of individual differences in general verbal ability, verbal learning and letter and category fluency were examined in two independent samples of 9- and 18-year-old twin pairs and their siblings. In both age groups, we observed strong familial resemblance for general verbal ability and moderate familial resemblance for verbal learning, letter and category fluency. All familial resemblance was explained by genetic factors. There was significant covariance among the tests, which was stronger in magnitude in the adolescent cohort. The covariance was mainly explained by genetic effects shared by subtests, both in middle childhood and in late adolescence. In addition to a shared set of genes that influenced all phenotypes, there were also genetic influences specific to the different verbal phenotypes.
Descriptors: Twins, Verbal Learning, Late Adolescents, Genetics, Verbal Ability, Children, Etiology, Individual Differences, Siblings, Age Differences, Family Influence, Child Development, Developmental Stages
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Publication Type: Journal Articles; Reports - Research
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