Argues that a thorough understanding of factors that influence aggression in children cannot be achieved without including behavior genetic studies that allow examination of the effects of shared versus non-shared environment, as well as genes, on aggressive behaviors. Details the growing body of evidence on the genetic effects on aggression.…

Examined the concordance between mother-infant attachment behavior and patterns of mother-child reunion responses when the children were age six. Found that concordance between four types of attachment status was 82%. Also found a correlation between children's observed social competence at age five and their reunion patterns at age six. (MDM)