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Peer reviewedTomblin, J. Bruce; Buckwalter, Paula R. – Journal of Speech, Language, and Hearing Research, 1998
To examine the basis of familiar associations with poor language achievement, 62 twin pairs and 3 triplet sets were studied in which at least one member presented poor oral-language status in the absence of other impairments. The language status of monozygotic pairs was highly similar. (Author/CR)
Descriptors: Genetics, Heredity, Language Impairments, Performance Factors
Peer reviewedBishop, Dorothy V. M.; Price, Thomas S.; Dale, Philip S.; Plomin, Robert – Journal of Speech, Language, and Hearing Research, 2003
A study involving 356 twin pairs with early language delay found environmental influences shared by both twins were more substantial than genetic factors. Heritability was significantly higher in those with persisting difficulties but only when assessed in terms of parental concern at 3 years or professional involvement at 4 years. (Contains…
Descriptors: Child Development, Early Childhood Education, Early Identification, Early Intervention
