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Peer reviewedLahey, Margaret; Edwards, Jan – Journal of Speech and Hearing Research, 1995
Analysis of characteristics of 53 children with specific language impairment (SLI), ages 4 to 9, suggested that family history is related to pattern of language performance. Children with deficits in only expressive language had a higher proportion of affected family members than did children with both expressive and receptive language deficits.…
Descriptors: Etiology, Expressive Language, Family Environment, Family Influence
Direct linkDeThorne, Laura S.; Petrill, Stephen A.; Hayiou-Thomas, Marianna E.; Plomin, Robert – Journal of Speech, Language, and Hearing Research, 2005
This study of 4,274 pairs of 4-year-old twins from the Twins Early Development Study explored the magnitude of genetic and environmental effects on low expressive vocabulary skill, both as a function of general cognitive ability and as a function of the severity of expressive vocabulary impairment. Assessments were conducted through parent report…
Descriptors: Severity (of Disability), Vocabulary Skills, Cognitive Ability, Twins
