Background: The implementation of preventive interventions is considered a crucial aspect of their success. However, few studies have investigated which components of implementation are most important. Objective: We aimed to understand whether the components of implementation integrity--adherence, quality of delivery, dose, and participants'…

Background: Physical activity and structural differences in the hippocampus have been linked to educational outcome. We investigated whether a curriculum-based physical activity intervention correlates positively with children's academic achievement, psychological well-being, health-related quality of life (HRQoL), fitness, and structural…

Forty-six mothers at psychosocial risk who had undergone interaction treatment when their children were babies were studied with respect to experienced negative life events, social network, and behavior problems in children. One reference group comprising 45 nontreated mothers at psychosocial risk and one comprising 56 mothers without psychosocial…

A meta-analysis of 47 studies investigating the relationship between family-centered helpgiving practices and parent, family, and child behavior and functioning is reported. The studies included more than 11,000 participants from seven different countries. Data analysis was guided by a practice-based theory of family-centered helpgiving that…

This book describes survey data and an intervention program conducted in Sweden and Norway as part of a government-led nationwide campaign against bullying. The survey data support some conventional wisdom about bullying, but also destroy many longheld myths about bullies and victims. The goals of the intervention program were to: (1) reduce or…