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Peer reviewedDionne, Ginette; Dale, Philip S.; Boivin, Michel; Plomin, Robert – Child Development, 2003
Two cohorts of same-sex twin pairs were assessed on grammar and vocabulary. Findings indicated that vocabulary and grammar correlated strongly at 2 and 3 years in both cohorts, with a consistently high genetic correlation between vocabulary and grammar at both ages. Findings suggest that the same genetic influences operate for vocabulary and…
Descriptors: Correlation, Genetics, Grammar, Language Acquisition
