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Hayiou-Thomas, Marianna E.; Dale, Philip S.; Plomin, Robert – Journal of Speech, Language, and Hearing Research, 2014
Purpose: The authors of this article examined the etiology of developmental language impairment (LI) at 4 and 12 years of age, as well as the relationship between the 2. Method: Phenotypic and quantitative genetic analyses using longitudinal data from the Twins Early Development Study (Oliver & Plomin, 2007) were conducted. A total of 2,923…
Descriptors: Language Impairments, Prediction, Etiology, Twins
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Dworzynski, Katharina; Ronald, Angelica; Hayiou-Thomas, Marianna; Rijsdijk, Fruhling; Happe, Francesca; Bolton, Patrick F.; Plomin, Robert – International Journal of Language & Communication Disorders, 2007
Background: Impairments in language and communication are core features of autism spectrum disorders (ASDs). The basis for this association is poorly understood. How early language is related to each of the triad of impairments characteristic of ASDs is also in need of clarification. Aims: This is the first study that aims to determine the extent…
Descriptors: Language Aptitude, Genetics, Children, Asperger Syndrome