Bullying is often ongoing during middle- and high-school. However, limited research has examined how cumulative experiences of victimization, perpetration, and bystander behavior impact adolescent behavioral and mental health and academic achievement outcomes at the end of high school. The current study used a sample of over 8000 middle- and high-school students (51% female; mean age 12.5 years) from the Rural Adaptation Project in North Carolina to investigate how cumulative experiences as a bullying victim and perpetrator over 5 years, and cumulative experiences of bystander behavior over 2 years impacted students' aggression, internalizing symptoms, academic achievement, self-esteem, and future optimism. Following multiple imputation, analysis included a Structural Equation Model with excellent model fit. Findings indicate that cumulative bullying victimization was positively associated with aggression and internalizing symptoms, and negatively associated with self-esteem and future optimism. Cumulative bullying perpetration was positively associated with aggression and negatively associated with future optimism. Cumulative negative bystander behavior was positively associated with aggression and internalizing symptoms and negatively associated with academic achievement and future optimism. Cumulative prosocial bystander behavior was positively associated with internalizing symptoms, academic achievement, self-esteem, and future optimism. This integrative model brings together bullying dynamics to provide a comprehensive picture of implications for adolescent behavioral and mental health and academic achievement.
Keywords: Adolescence; Bullying; Bystander Behavior; Perpetration; Victimization.