Defending peers who have been bullied is often thought to put defenders at risk of becoming victimized themselves. The study investigated the concurrent and prospective associations between defending and (peer- and self-reported) victimization, and examined popularity and classroom norms as potential moderators. Participants included 4085 Finnish…

During four decades, numerous school-based bullying prevention programmes have been developed and evaluated. Meta-analyses indicate that such programmes have positive average effects, as compared with treatment as usual. However, the effects are small to moderate, and they are especially weak among some specific groups, such as adolescents. After…

Bullying is a major health problem. The KiVa antibullying program has been evaluated in Finland and other European countries, showing preventive effects on self-reported bullying victimization and perpetration. No evaluations of this program have been conducted in Latin America. A cluster randomized controlled trial was conducted at socially…

Victimization during school years can have detrimental effects on individuals' adjustment, lasting even into adulthood. In the current study, we examine whether there is an indirect effect of victimization on adult depression and aggression, via sad and angry rumination about past victimization. Participants included 1,319 Finnish individuals…

Social dominance goals have been conceptualized as orientations toward powerful and prominent positions in the peer group. Although previous studies have identified social dominance goals as one of the main motivations behind bullying, few studies have disentangled the time-invariant (average level) from the time-varying (year-to-year) effects of…

The current study examines whether peer victimization experienced in early adolescence is associated with compromised social functioning 14 years later in young adulthood. The sample involved 1533 young adults (65.1% female, M[subscript age] = 27.06) who had participated in a large research project as middle school students (7th and 8th graders,…

The present longitudinal study examined how and why classroom-level victimization moderates the prospective association between peer victimization and depressive symptoms with 2,643 third- and fourth-graders (M[subscript age] = 10.01 years) in China. Multilevel modeling revealed that peer victimization was more strongly associated with increasing…

We analyzed developmental changes in outsider behavior, testing whether the likelihood that it turns into bullying or defending over time depends on the individual proneness to feel shame or guilt. Participants were 155 preadolescents (72 boys and 83 girls; [X-bar][subscript age] at T1 = 10.74 years). Bullying, defending, and outsider behaviors…

Sharing a classroom environment with other victimized peers has been shown to mitigate the adverse effects of peer victimization on children's social and psychological adjustment. By extension, this study hypothesized that classroom reductions in the proportion of victims would be harmful for children who remain victimized. Data were collected at…

Background: Bullying is a widespread problem in schools. Although several effective school-based bullying intervention programmes have been developed to reduce bullying and victimisation, it has rarely been investigated whether intervention programmes are also effective in helping bully-victims. Purpose: This study investigates the effectiveness…

Teachers do not always recognise students who are victimised by their peers. In this study, we examined the recognition of stable victims in 76 schools beginning to implement the KiVa antibullying programme. We focused on 348 victims (9-15 years) who reported victimisation at the pretest and still at wave 2, after five months of programme…

This article provides a view of school bullying as a group phenomenon and practical implications stemming from this approach. The motivation for bullying perpetration often relates to one's social standing in the group. Peer bystanders are typically present when bullying takes place, often providing the perpetrators with social rewards. The…

This study investigated the effectiveness of the KiVa Antibullying Program in two samples of students, one from Grades 1-3 (7-9 years old, N = 6,927) and the other from Grades 7-9 (13-15 years old, N = 16, 503). The Grades 1-3 students were located in 74 schools and Grades 7-9 students in 73 schools that were randomly assigned to intervention and…

This study examined whether the degree to which bullying is normative in the classroom would moderate associations between "intra"- (cognitive and affective empathy, self-efficacy beliefs) and "inter"personal (popularity) factors and defending behavior. Participants were 6,708 third- to fifth-grade children (49% boys;…

In this study we examined children's self-efficacy, outcome expectations, and outcome values in relation to bystander responses in bullying situations. We proposed that beyond the effect of self-efficacy, the decision to defend the victim of bullying vs. remain passive vs. reinforce the bully depends on outcomes children expect from defending, and…