This study aims to analyze the relationship between Attachment Style and bullying behavior among senior high school students in Jakarta and to identify its implications for strengthening student services management. A quantitative approach with a correlational design was employed, using structured questionnaires distributed to one hundred students. Data were analyzed through normality testing, linearity testing, and simple linear regression to examine the contribution of Attachment Style to bullying behavior. The findings show that most students were categorized as having a moderate Attachment Style, while bullying behavior was predominantly in the moderate to high category. Regression analysis revealed a significant positive relationship, indicating that higher levels of insecure Attachment Style are associated with a greater tendency to engage in bullying. The coefficient of determination demonstrates that Attachment Style has a strong influence on variations in bullying behavior. These results highlight the need to strengthen student services management by developing emotional support systems, implementing counseling programs based on Attachment Style, and creating a more responsive and supportive school environment to prevent bullying and promote students’ social and emotional well-being.
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