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Direct linkOlson, Richard K.; Keenan, Janice M.; Byrne, Brian; Samuelsson, Stefan – Scientific Studies of Reading, 2014
Modern behavior-genetic studies of twins in the United States, Australia, Scandinavia, and the United Kingdom show that genes account for most of the variance in children's reading ability by the end of the 1st year of formal reading instruction. Strong genetic influence continues across the grades, though the relevant genes vary for reading words…
Descriptors: Reading Skills, Skill Development, Child Development, Genetics
Ebejer, Jane L.; Coventry, William L.; Byrne, Brian; Willcutt, Erik G.; Olson, Richard K.; Corley, Robin; Samuelsson, Stefan – Scientific Studies of Reading, 2010
Twin children from Australia, Scandinavia, and the United States were assessed for inattention, hyperactivity-impulsivity, and reading across the first 3 school years. Univariate behavior-genetic analyses indicated substantial heritability for all three variables in all years. Longitudinal analyses showed one genetic source operating across the…
Descriptors: Elementary School Students, Foreign Countries, Attention Deficit Hyperactivity Disorder, Genetic Disorders
Peer reviewedSamuelsson, Stefan; And Others – Scandinavian Journal of Educational Research, 1996
Results from a study of the development of word-decoding skills in 60 8-year-old and 60 10-year-old children are consistent with models suggesting that children become proficient in phonological decoding first, and then shift gradually to a more direct orthographic-decoding strategy. (SLD)
Descriptors: Age Differences, Beginning Reading, Child Development, Decoding (Reading)
