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Harlaar, Nicole; Meaburn, Emma L.; Hayiou-Thomas, Marianna E.; Davis, Oliver S. P.; Docherty, Sophia; Hanscombe, Ken B.; Haworth, Claire M. A.; Price, Thomas S.; Trzaskowski, Maciej; Dale, Philip S.; Plomin, Robert – Journal of Speech, Language, and Hearing Research, 2014
Purpose: Researchers have previously shown that individual differences in measures of receptive language ability at age 12 are highly heritable. In the current study, the authors attempted to identify some of the genes responsible for the heritability of receptive language ability using a "genome-wide association" approach. Method: The…
Descriptors: Receptive Language, Genetics, Individual Differences, Twins
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Antshel, Kevin M.; Faraone, Stephen V.; Stallone, Kimberly; Nave, Andrea; Kaufmann, Felice A.; Doyle, Alysa; Fried, Ronna; Seidman, Larry; Biederman, Joseph – Journal of Child Psychology and Psychiatry, 2007
Background: The aim of this study was to assess the validity of diagnosing attention deficit/hyperactivity disorder (ADHD) in high IQ children and to further characterize the clinical features associated with their ADHD. Methods: We operationalized giftedness/high IQ as having a full scale IQ greater than or equal to 120. We identified 92 children…
Descriptors: Attention Deficit Hyperactivity Disorder, Intelligence Quotient, Psychopathology, Clinical Diagnosis
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Spitz, Herman H. – Intelligence, 1988
From published data on the Wechsler subtest performance of mild and borderline mentally retarded persons, 4,304 protocols from 4,004 individuals were collated and their subtest patterns on other Wechsler instruments were compared. Results indicate that mildly retarded groups tend to score lower on subtests that better measure general intelligence.…
Descriptors: Comparative Analysis, Heredity, Intelligence Tests, Mild Mental Retardation