A Large-Scale Evaluation of the Olweus Bullying Prevention Program

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The purpose of this study, published in the first edition of the new International Journal of Bullying Prevention in March, was to evaluate the effectiveness of the Olweus Bullying Prevention Program (OBPP) in reducing specific forms of bullying – verbal bullying, physical bullying, and indirect/relational bullying, as well as cyberbullying and bullying using words or gestures with a sexual meaning. This large-scale longitudinal study, which involved more than 30,000 students in grades 3–11 from 95 schools in central and western Pennsylvania over the course of 3 years, employed a quasi-experimental extended age-cohort design to examine self-reports of being bullied, as well as bullying others.

Findings revealed that the OBPP was successful in reducing all forms of being bullied and bullying others. Analyses by grade groupings (grades 3–5, 6–8, and 9–11) revealed that, with only a few exceptions, there were significant program effects for all forms of bullying for all grade groupings. For most analyses, program effects were stronger the longer the program was in place.

Read the abstract of the study or download study.

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