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Direct linkPetrill, Stephen; Logan, Jessica; Hart, Sara; Vincent, Pamela; Thompson, Lee; Kovas, Yulia; Plomin, Robert – Journal of Learning Disabilities, 2012
The authors examined whether math fluency was independent from untimed math and from reading using 314 pairs of school-aged twins drawn from the Western Reserve Reading and Math Projects. Twins were assessed through a 90-min home visit at approximately age 10 and were reassessed in their homes approximately 1 year later. Results suggested that the…
Descriptors: Mathematics Achievement, Twins, Reading Fluency, Home Visits
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
Hart, Sara A.; Petrill, Stephen A.; Thompson, Lee A.; Plomin, Robert – Journal of Educational Psychology, 2009
The goal of this first major report from the Western Reserve Reading Project Math component is to explore the etiology of the relationship among tester-administered measures of mathematics ability, reading ability, and general cognitive ability. Data are available on 314 pairs of monozygotic and same-sex dizygotic twins analyzed across 5 waves of…
Descriptors: Twins, Reading Fluency, Problem Solving, Genetics
