%0 Journal Article
%T Genetic and environmental sources of continuity and change in teacher-rated aggression during early adolescence
%J Aggressive behavior
%D 2006
%A Vierikko, Elina
%A Pulkkinen, Lea
%A Kaprio, Jaakko A.
%A Rose, Richard J.
%V 32
%N 4
%P 308-320
%X Genetic and environmental sources of continuity and change in aggression were studied in a sample of 1,041 twin pairs (364 monozygotic; 348 same-sex dizygotic; and 329 opposite-sex dizygotic) as part of an ongoing, population-based Finnish twin-family study. At ages 12 and 14, the twins' aggression was assessed by their classroom teachers, using a rating form of the Multidimensional Peer Nomination Inventory. Genetic and environmental sources of continuity and change were studied by fitting a longitudinal bivariate Cholesky decomposition model. Longitudinal model-fitting results indicated that both genetic and environmental factors influenced continuity in aggression during this 2-year period, but the age-to-age correlation of these factors differed by sex. Continuity in boys' aggression was mediated by genes and common environmental factors; in girls, in contrast, continuity was due primarily to common environmental, and to a lesser degree, unique environmental factors. Genes and unique environments contributed to change in aggression in both sexes.<p /> <p>Language: en</p>
%G en
%I John Wiley and Sons
%@ 0096-140X
%U http://dx.doi.org/10.1002/ab.20117