Abstract
The current study used meta-regression to establish trends in bullying from 1998 to 2017, to identify factors that help explain variation in bullying trends, and to determine differences in the trends by gender and grade. This study focused on trends of face-to-face (FTF) bullying victimization and perpetration, cyberbullying victimization, relational bullying victimization, verbal bullying victimization, and physical bullying victimization, as well as characteristics of the youth involved. It also explored methodological and survey differences to help determine which factors contribute to variation from study to study. A systematic search found 91 studies reporting trends of bullying, from 1998 to 2017, that met predefined inclusion and exclusion criteria. The findings illustrate no significant time trend when looking at FTF bullying victimization, yet an increasing time trend for cyberbullying victimization. Additional trends begin to emerge when stratifying the findings by grade and gender, with FTF bullying victimization among boys declining, while FTF bullying victimization among girls is increasing. Across both FTF bullying victimization and cyberbullying victimization, younger adolescents report significantly more bullying than older adolescents, and this is consistent over time. Verbal and physical bullying victimization as well as FTF bullying perpetration have significantly declined over time. This study also identified key variables that contribute to the variation from trend study to trend study. The implications of these findings inform both policy and practice and provide insight into the overall scope of bullying within the United States.
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