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Rodriguez, Nicole M.; Thompson, Rachel H.; Stocco, Corey S.; Schlichenmeyer, Kevin – Journal of Intellectual & Developmental Disability, 2013
Background: There is a need for a more accurate characterisation of higher level restricted and repetitive behaviour (RRB) in autism spectrum disorder (ASD), including why it might be considered problematic and events associated with its occurrence. Method: We selected one form of higher level RRB--arranging and ordering--that was rated as severe…
Descriptors: Autism, Pervasive Developmental Disorders, Severity (of Disability), Correlation
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Friedman, Naomi P.; Miyake, Akira; Robinson, JoAnn L.; Hewitt, John K. – Developmental Psychology, 2011
We examined whether self-restraint in early childhood predicted individual differences in 3 executive functions (EFs; inhibiting prepotent responses, updating working memory, and shifting task sets) in late adolescence in a sample of approximately 950 twins. At ages 14, 20, 24, and 36 months, the children were shown an attractive toy and told not…
Descriptors: Late Adolescents, Individual Differences, Genetics, Toys