Effectiveness of the KiVa Antibullying Program

摘要: According to the participant role approach (Salmivalli, Lagerspetz, Bjorkqvist, Osterman, & Kaukiainen, 1996), bullying is a group phenomenon that largely enabled and maintained by classmates taking on different roles (e.g., reinforcers or assistants of bully). There is, however, very little evidence whether bystander behaviors actually have an effect risk for victimization. Furthermore, implies bystanders should be used in putting end bullying. This view has been put into practice KiVa antibullying program, but it not yet investigated program effective. Four studies were conducted investigate, (a) victimization (Study I) (b) reduces other beneficial effects as well (Studies II–IV). The participants included large samples elementary lower secondary school students (Grades 1–9) from Finland. assessments done with web-based questionnaires including questions about (both selfand peer reports), several bullying-related constructs. results this thesis suggest situations may influence vulnerable students. Moreover, indicate effective reducing are larger schools than schools, whereas Grades 8 9, they boys girls some peer-reported outcomes. magnitude overall can considered practically significant when obtained large-scale dissemination program.