Longitudinal data from a large sample of twins participating in the Netherlands Twin Register (n = 42,827, age range 3-16) were analyzed to investigate the genetic and environmental contributions to childhood aggression. Genetic auto-regressive (simplex) models were used to assess whether the same genes are involved or whether new genes come into…

Evidence points to associations between the socioeconomic composition of neighborhoods and children's and adolescents' development. A minimal amount of research, however, examines how timing of exposure to neighborhood socioeconomic conditions matters. This study used longitudinal data from the NICHD Study of Early Child Care and Youth Development…

This study examined early elementary school children's trajectories of peer victimization with a sample of 218 boys and girls. Peer victimization was assessed (via peer report) in kindergarten and first, second, and fifth grades. Hierarchical linear modeling (HLM) was used to examine multiple types of relationships (mother-child, student-teacher,…

Background: This study examines how and why children change in aggression and delinquency from age 6 to 15 years. Besides assessing the shape of the developmental trajectories of aggression and delinquency, we investigated whether child personality characteristics, parenting, and interactions between these two predict the development of…

This study examined differences in two residential care giving models (houseparent vs. child care worker) in providing continuity of care for youth in residential placement, and the effect that a care giving model had on selected program outcomes. Data for this research were collected in a residential facility that used both models. Youth with…