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Direct linkHart, Sara A.; Logan, Jessica A. R.; Thompson, Lee; Kovas, Yulia; McLoughlin, Gráinne; Petrill, Stephen A. – Journal of Educational Psychology, 2016
Underperformance in math is a problem with increasing prevalence, complex etiology, and severe repercussions. This study examined the etiological heterogeneity of math performance in a sample of 264 pairs of 12-year-old twins assessed on measures of math achievement, numerosity, and math anxiety. Latent profile analysis indicated 5 groupings of…
Descriptors: Number Concepts, Numeracy, Mathematics Anxiety, Twins
Petrill, 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
Petrill, Stephen A.; Hart, Sara A.; Harlaar, Nicole; Logan, Jessica; Justice, Laura M.; Schatschneider, Christopher; Thompson, Lee; DeThorne, Laura S.; Deater-Deckard, Kirby; Cutting, Laurie – Journal of Child Psychology and Psychiatry, 2010
Background: Studies have suggested genetic and environmental influences on overall level of early reading whereas the larger reading literature has shown environmental influences on the rate of growth of early reading skills. This study is the first to examine the genetic and environmental influences on both initial level of performance and rate…
Descriptors: Twins, Phonemes, Early Reading, Home Visits
Hart, Sara A.; Petrill, Stephen A.; DeThorne, Laura S.; Deater-Deckard, Kirby; Thompson, Lee A.; Schatschneider, Chris; Cutting, Laurie E. – Journal of Child Psychology and Psychiatry, 2009
Background: Despite the well-replicated relationship between the home literacy environment and expressive vocabulary, few studies have examined the extent to which the home literacy environment is associated with the development of early vocabulary ability in the context of genetic influences. This study examined the influence of the home literacy…
Descriptors: Twins, Mothers, Home Visits, Emergent Literacy
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
