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Petrill, Stephen A.; Deater-Deckard, Kirby; Thompson, Lee Anne; Schatschneider, Chris; DeThorne, Laura S.; Vandenbergh, David J. – Reading and Writing: An Interdisciplinary Journal, 2007
We examined the genetic and environmental contribution to the stability and instability of reading outcomes in early elementary school using a sample of 283 twin pairs drawn from the Western Reserve Reading Project. Twins were assessed across two measurement occasions. In Wave 1, children were either in kindergarten or first grade. Wave 2…
Descriptors: Grade 1, Early Reading, Environmental Influences, Twins