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Direct linkKirkpatrick, Robert M.; Legrand, Lisa N.; Iacono, William G.; McGue, Matt – Learning and Individual Differences, 2011
Existing behavior-genetic research implicates substantial influence of heredity and modest influence of shared environment on reading achievement and reading disability. Applying DeFries-Fulker analysis to a combined sample of twins and adoptees (N = 4886, including 266 reading-disabled probands), the present study replicates prior findings of…
Descriptors: Reading Achievement, Reading Difficulties, Twins, Adoption
Hart, Sara A.; Petrill, Stephen A.; Thompson, Lee A. – Learning and Individual Differences, 2010
The present study examined the phenotypic and genetic relationship between fluency and non-fluency-based measures of reading and mathematics performance. Participants were drawn from the Western Reserve Reading and Math Project, an ongoing longitudinal twin project of same-sex MZ and DZ twins from Ohio. The present analyses are based on…
Descriptors: Twins, Genetics, Reading Ability, Mathematics Achievement
