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Harlaar, Nicole; Dale, Philip S.; Plomin, Robert – Child Development, 2007
Little is known about the underlying causes and developmental patterns of stability and change in early reading abilities. In a longitudinal study of twins (n=4,291 pairs), individual differences in reading achievement assessed by teachers using U.K. National Curriculum (NC) criteria showed substantial heritabilities at ages 7, 9, and 10 years…
Descriptors: Early Reading, Environmental Influences, Reading Ability, Reading Achievement
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Haworth, Claire M. A.; Meaburn, Emma L.; Harlaar, Nicole; Plomin, Robert – Mind, Brain, and Education, 2007
Twin-study research suggests that many (but not all) of the same genes contribute to genetic influence on diverse learning abilities and disabilities, a hypothesis called "generalist genes". This generalist genes hypothesis was tested using a set of 10 DNA markers (single nucleotide polymorphisms [SNPs]) found to be associated with early reading…
Descriptors: Early Reading, Prevention, Learning Disabilities, Genetics