Background: Schools increasingly prioritize social-emotional competence and bullying and cyberbullying prevention, so the development of novel, low-cost, and high-yield programs addressing these topics is important. Further, rigorous assessment of interventions prior to widespread dissemination is crucial. Objective: This study assesses the…

Bullying between students at school can seriously affect students' health and academic outcomes. To date, little is known regarding the extent to which bullying behaviour is clustered within certain schools rather than similarly prevalent across all schools. Additionally, studies of bullying behaviour in schools that do not account for clustering…

A two-part screening procedure was used to assess school-age children's experience with bullying. In the first part 16,799 students (8,195 girls, 8,604 boys) in grades 4 to 12 were provided with a definition of bullying and then asked about their experiences using two general questions from the Olweus Bully/Victim Questionnaire (1996). In the…