TY - JOUR
T1 - Reading skills in early readers
T2 - Genetic and shared environmental influences
AU - Petrill, Stephen A.
AU - Deater-Deckard, Kirby
AU - Thompson, Lee Anne
AU - DeThorne, Laura S.
AU - Schatschneider, Christopher
PY - 2006
Y1 - 2006
N2 - 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 twins, and unrelated adoptive siblings). The study included measures of letter and word identification, phonological awareness, phonological decoding, rapid automatized naming, and general cognitive ability. Estimates of additive generic effects and shared environmental effects were moderate and significant. Furthermore, shared environmental effects estimated in twins were generally similar in magnitude to adoptive sibling correlations, suggesting highly replicable estimates across different study designs.
AB - 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 twins, and unrelated adoptive siblings). The study included measures of letter and word identification, phonological awareness, phonological decoding, rapid automatized naming, and general cognitive ability. Estimates of additive generic effects and shared environmental effects were moderate and significant. Furthermore, shared environmental effects estimated in twins were generally similar in magnitude to adoptive sibling correlations, suggesting highly replicable estimates across different study designs.
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U2 - 10.1177/00222194060390010501
DO - 10.1177/00222194060390010501
M3 - Article
C2 - 16512082
AN - SCOPUS:32844468047
SN - 0022-2194
VL - 39
SP - 48
EP - 55
JO - Journal of Learning Disabilities
JF - Journal of Learning Disabilities
IS - 1
ER -