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Byrne, Brian; Wadsworth, Sally; Boehme, Kristi; Talk, Andrew C.; Coventry, William L.; Olson, Richard K.; Samuelsson, Stefan; Corley, Robin – Scientific Studies of Reading, 2013
The genetic factor structure of a range of learning measures was explored in twin children, recruited in preschool and followed to Grade 2 ("N"?=?2,084). Measures of orthographic learning and word reading were included in the analyses to determine how these patterned with the learning processes. An exploratory factor analysis of the…
Descriptors: Genetics, Preschool Children, Elementary School Students, Kindergarten
Byrne, Brian; Coventry, William L.; Olson, Richard K.; Wadsworth, Sally J.; Samuelsson, Stefan; Petrill, Stephen A.; Willcutt, Erik G.; Corley, Robin – Journal of Educational Psychology, 2010
It is often assumed that differences in teacher characteristics are a major source of variability in children's educational achievements. We examine this assumption for early literacy achievement by calculating the correlations between pairs of twin children who either shared or did not share a teacher in kindergarten, Grade 1, and Grade 2.…
Descriptors: Twins, Teacher Characteristics, Academic Achievement, Emergent Literacy
Byrne, Brian; Samuelsson, Stefan; Wadsworth, Sally; Hulslander, Jacqueline; Corley, Robin; DeFries, John C.; Quain, Peter; Willcutt, Erik G.; Olson, Richard K. – Reading and Writing: An Interdisciplinary Journal, 2007
Grade 1 literacy skills of twin children in Australia (New South Wales) and the United States (Colorado) were explored in a genetically sensitive design (N = 319 pairs). Analyses indicated strong genetic influence on word and nonword identification, reading comprehension, and spelling. Rapid naming showed more modest, though reliable, genetic…
Descriptors: Longitudinal Studies, Emergent Literacy, Preschool Children, Kindergarten