Chapter

Etiology of the Stability of Reading Performance from 7 to 12 Years of Age and Its Possible Mediation by IQ

Sally J. Wadsworth and John C. Defries

in Nature, Nurture, and the Transition to Early Adolescence

Published in print May 2003 | ISBN: 9780195157475
Published online March 2012 | e-ISBN: 9780199848065 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195157475.003.0004
Etiology of the Stability of                         Reading Performance from 7 to 12 Years of Age and Its Possible Mediation by                         IQ

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In addition to common genetic factors on reading ability at different ages, other variables may mediate the stability of individual differences in reading performance over time. For example, measures of reading performance are correlated with measures of general cognitive ability both phenotypically and genetically. Further, results of studies focusing on the etiology of stability of general and specific cognitive abilities provide evidence for substantial and significant genetic stability from age to age. This chapter presents the results of a study that assessed the etiology of stability of individual differences in reading performance from age seven to age twelve, and its possible mediation by intelligence quotient (IQ), in a sample of related and unrelated sibling pairs tested in the Colorado Adoption Project. This chapter hypothesizes that the stability of reading performance may be mediated both phenotypically and genetically, at least in part, by IQ.

Keywords: Colorado Adoption Project; reading ability; etiology; stability; cognitive ability; intelligence quotient

Chapter.  4834 words.  Illustrated.

Subjects: Developmental Psychology

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