Razaq Azeez - Department of Educational Foundations and Counselling, Faculty of Education, Olabisi Onabanjo University, Ago-Iwoye, Nigeria
Segun Babalola - Department of Educational Foundations and Counselling, Faculty of Education, Olabisi Onabanjo University, Ago-Iwoye, Nigeria

Abstract Introduction: This study investigated the efficacy of cognitive behavioral group therapy on aggression among adolescents in secondary schools, Ibadan metropolis, Oyo State, Nigeria. Method: The study employed a pretest-post-test quasi-experimental research design. Participants included ۱۶۰ secondary school adolescents from four randomly selected public secondary schools who were randomly allocated to treatment and control groups for this study. Aggressive Behavior Questionnaire by Buss and Perry was used to collect data for the participants. All the formulated hypotheses were tested using the Analysis of Covariant (ANCOVA). Results: Results revealed that the treatment was effective in treating adolescents’ aggressive behavior. Furthermore, findings revealed that the moderating variables (gender and socio-economic background) did not individually have significant effects on the aggressive behavior of adolescents. The two-way interaction of gender and socio-economic background had no significant effect on the criterion variable; and the three-way interaction of gender, socio-economic background and treatment were not significant. Conclusion: It is therefore recommended that cognitive behavioral group therapy can be adopted as an effective intervention strategy for addressing aggression among adolescents in secondary schools

Keywords: Aggression, Cognitive Behavioral group therapy, Gender, socio-economic background