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Genetic and Environmental Influences on the Growth of Early Reading Skills
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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
Genetic and Environmental Effects of Serial Naming and Phonological Awareness on Early Reading Outcomes
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Petrill, Stephen, A.; Deater-Deckard, Kirby; Thompson, Lee Anne; DeThorne, Laura S.; Schatschneider, Christopher – Journal of Educational Psychology, 2006
The current study involved 281 early-school-age twin pairs (118 monozygotic, 163 same-sex dizygotic) participating in the ongoing Western Reserve Reading Project (S. A. Petrill, K. Deater-Deckard, L. A. Thompson, & C. Schatschneider, 2006). Twins were tested in their homes by separate examiners on a battery of reading-related skills including…
Descriptors: Early Reading, Environmental Influences, Twins, Reading Skills
Reading Skills in Early Readers: Genetic and Shared Environmental Influences
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Petrill, Stephen A.; Deater-Deckard, Kirby; Thompson, Lee Anne; DeThorne, Laura S.; Schatschneider, Christopher – Journal of Learning Disabilities, 2006
The present study combined parallel data from the Northeast-Northwest Collaborative Adoption Projects (N2CAP) and the Western Reserve Reading Project (WRRP) to examine sibling similarity and quantitative genetic model estimates for measures of reading skills in 272 school-age sibling pairs from three family types (monozygotic twins, dizygotic…
Descriptors: Environmental Influences, Cognitive Ability, Twins, Reading Skills
Measured Environmental Influences on Early Reading: Evidence From an Adoption Study
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Petrill, Stephen A.; Deater-Deckard, Kirby; Schatschneider, Christopher; Davis, Chayna – Scientific Studies of Reading, 2005
Many studies have examined the relationship between environmental processes and literacy outcomes. However, nearly all of this research has examined biologically related family members living together, thus confounding genetic and environmental influences. The purpose of this study was to address this issue using a sample of 262 adopted children…
Descriptors: Early Reading, Environmental Influences, Family Environment, Educational Attitudes