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Justice, Laura M.; Petscher, Yaacov; Schatschneider, Christopher; Mashburn, Andrew – Child Development, 2011
With an increasing number of young children participating in preschool education, this study determined whether peer effects are present in this earliest sector of schooling. Specifically, this work examined whether peer effects were influential to preschoolers' growth in language skills over an academic year and whether peer effects manifest…
Descriptors: Preschool Education, Peer Influence, Language Skills, Preschool Children
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Brendgen, Mara; Boivin, Michel; Vitaro, Frank; Bukowski, William M.; Dionne, Ginette; Tremblay, Richard E.; Perusse, Daniel – Child Development, 2008
Based on a sample of 406 seven-year-old twins, this study examined whether exposure to friends' social or physical aggression, respectively, moderates the effect of heritability on children's own social and physical aggression. Univariate analyses showed that children's own social and physical aggression were significantly explained by genetic…
Descriptors: Aggression, Genetics, Interaction, Antisocial Behavior