Meta-analysis allows researchers to combine evidence from multiple studies, making it a powerful tool for synthesizing information on the safety profiles of new medical interventions. There is a critical need to identify subgroups at high risk of experiencing treatment-related toxicities. However, this remains quite challenging from a statistical…

Intrinsic motivation (IM) is an important predictor of children's physical activity participation. The present 3-year longitudinal study examined changes in IM toward physical activity among a group of at-risk boys (N = 92) at a summer sports camp. Results showed the boys were intrinsically motivated in their first camp year, but their IM levels…

Objectives: To examine the components affecting the quality of the implementation and their impact on the outcomes of the "Growing Up Happily in the Family" program targeted at parents with children aged 0-5. Method: At-risk and non-at-risk parents (N = 196) participated in 26 groups in local social services. Adherence, adaptations,…

Given the potential of afterschool programs to support youth in urban, low-income communities, we examined the role of afterschool classroom ecology in the academic outcomes of Latino and African American youth with and without social-behavioral risk. Using multireporter methods and multilevel analysis, we find that positive classroom ecology…

This study evaluated the extent to which developmental change in coordination of social communication in early infancy differentiates children eventually diagnosed with ASD from those not likely to develop the disorder. A prospective longitudinal design was used to compare nine infants at heightened risk for ASD (HR) later diagnosed with ASD, to…

Objective: The purpose of the present study was to evaluate the treatment effects of a relationship skills and family strengthening intervention for n = 726 high-risk, disadvantaged new parents. Method: Hierarchical linear modeling and regression models were used to assess intervention treatment effects. These findings were subsequently verified…

Background: The school environment is an important context for understanding risk factors for teen dating violence. This study seeks to add to the growing literature base linking adolescent experiences with bullying and involvement with teen dating violence. Methods: Data were collected from 27,074 adolescents at 58 high schools via a Web-based…

Use of multivariate analysis (e.g., multivariate analysis of variance) is common when normally distributed outcomes are collected in intervention research. However, when mixed responses--a set of normal and binary outcomes--are collected, standard multivariate analyses are no longer suitable. While mixed responses are often obtained in…

The current study examined interactions among genetic influences and children's early environments on the development of externalizing behaviors from 18 months to 6 years of age. Participants included 233 families linked through adoption (birth parents and adoptive families). Genetic influences were assessed by birth parent temperamental…

The present study concurrently analyzed risk and protective factors on the individual and the class level related to bullying and victimization in ethnically diverse schools. The sample derived from the pre-test data of a national intervention evaluation study in Austria (ViSC) and comprised 1,450 students (48.8% girls) aged 11-15 (M = 12.31) from…

The State of the Science conference was held in May, 2007 as part of the ongoing series of national conferences, "Building on Family Strengths," conducted by the Research and Training Center on Family Support and Children's Mental Health at Portland State University. The theme of this State-of-the Science conference was "Effective…