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Henderson, Lisa; Powell, Anna; Gaskell, M. Gareth; Norbury, Courtenay – Developmental Science, 2014
Autism spectrum disorder (ASD) is characterized by rich heterogeneity in vocabulary knowledge and word knowledge that is not well accounted for by current cognitive theories. This study examines whether individual differences in vocabulary knowledge in ASD might be partly explained by a difficulty with consolidating newly learned spoken words…
Descriptors: Autism, Pervasive Developmental Disorders, Language Acquisition, Vocabulary
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Ronald, Angelica; Happe, Francesca; Plomin, Robert – Developmental Science, 2005
Two types of behaviours shown in children--those reflecting social impairment and nonsocial obsessive repetitive behaviours--are central to defining and diagnosing autism spectrum disorders (ASDs). Parent and teacher data on social and nonsocial behaviours were obtained from a community sample of greater than 3000 7-year-old twin pairs. Social and…
Descriptors: Twins, Autism, Genetics, Individual Differences