Stephen A. Petrill|Kirby Deater?Deckard|Lee A. Thompson|Lewis Thorne|Christopher Schatschneider
Reading Skills in Early Readers
Pennsylvania State University|Case Western Reserve University|University of Illinois Urbana-Champaign|Florida State University
present study combined parallel data northeastnorthwest collaborative adoption projects n2cap western reserve reading project wrrp examine sibling similarity quantitative genetic model estimates measures reading skills 272 schoolage sibling pairs three family types monozygotic twins dizygotic twins unrelated adoptive siblings study included measures letter word identification phonological awareness phonological decoding rapid automatized naming general cognitive ability estimates additive genetic effects shared environmental effects moderate significant furthermore shared environmental effects estimated twins generally similar magnitude adoptive sibling correlations suggesting highly replicable estimates across different study designs