RT Journal Article T1 Roles involved in school violence: links with the problematic use of social networking sites, self-esteem, and loneliness in adolescents. A1 Moreno Ruiz, David A1 Montero-Montero, David A1 Romero-Abrio, Ana A1 Musitu Ochoa, Gonzalo K1 School-violence K1 Victim-aggressor K1 Self-esteem K1 Loneliness K1 Social networking AB The objective was to analyse the relationships between multidimensional self-esteem (academic, social, emotional, family, and physical), loneliness, the problematic use of social networking sites (PUSNS) and the different roles involved in school violence - non-involved, aggressors, victims and victim-aggressors-, depending on sex. Participants included 1,930 adolescents (50.2% girls) aged 12 to 18 years, schooled in the province of Seville (Spain). A MANOVA (4x2) was performed. Significant relationships were observed between the different school violence roles, loneliness, multidimensional self-esteem, and PUSNS. Specifically, depending on the dependent variables analysed, victims-aggressors presented a more negative profile than the rest of the roles observed, and the non-involved showed the best adjustment. It is also remarkable that the groups with the lowest scores in PUSNS are the two groups of non-involved individuals, both boys and girls, and the group of male victims. To finish, we describe the practical implications of the study. PB Sociedad Española de Investigación Criminológica YR 2024 FD 2024-11-18 LK https://hdl.handle.net/10433/22672 UL https://hdl.handle.net/10433/22672 LA en NO Moreno-Ruiz, D., Montero Montero, D., Romero-Abrio, A., & Musitu-Ochoa, G. (2024). Roles involved in school violence: links with the problematic use of social networking sites, self-esteem, and loneliness in adolescents. Revista Española De Investigación Criminológica, 22(1), e900. https://doi.org/10.46381/reic.v22i1.900 NO Bullying and cyberbullying among peers and in adolescent couples: from emotional regulation to suicidal ideation”, Ref. PID2019-109442RB-I00, funded by the Spanish Ministry of Science, Innovation and Universities of Spain. NO Departamento de Educación y Psicología Social. Universidad Pablo de Olavide DS RIO RD May 9, 2026