Behaviour is the way an individual translate input derived from interactions into action and reaction, either through verbal communication or through nonverbal communication. Behaviour is also influenced by an individual's emotions to respond or to react when interacting in the social context of society. However, social symptoms are getting a huge blow from the teens. The negativity in socialization are intensely prominent among teenagers. The behaviour of a school teen who violates the norm is a behaviour of a delinquent. These cases of misconduct have a negative impact on the wellbeing and peace of life in the community. In addition, there have been cases of social collapse of morals now widely circulating in the media regarding sexually explicit acts such as rape and premarital pregnancy. Several social factors can be identified to influence teens, of which most of them are still schooling. Therefore, this research aims to study the factors, relevance and differences of socialization in influencing individual behaviour. Total of 120 students, including 70 boys from Sekolah Tunas Bakti Sg. Besi and 50 girls from Asrama Bahagia Kg. Pandan. Both schools are those who are involved in juvenile cases and under control of the Department of Social Welfare (JKM). The design of the study is descriptive. Data was collected through a three-part questionnaire, which comprises of A Background Information of Students, B Five Socialization Factors, and C Aggressive Behaviour. The data collected was then analysed using SPSS (Statistical Package for Social Science) to evaluate percentages, frequency, correlation, T-test and Anova. Results found that male students were more likely to be influenced by mass media factors while female students were more likely to be influenced by peers. Ultimately, the research results reveal that the behaviour of individuals is influenced by three main factors, namely the media, peers and individual self. There were no significant differences between male and female gender for socialization factors influencing aggressive behavior. Therefore, some proposals have been formulated such as form new acts, emphasizing the importance of family as well as educational institutions such as schools.