Introduction: In our country, peer pressure in adolescence / high school students is a concept that has emerged to be emphasized in recent years. It has been shown that peer pressure and aggression negatively affect the emotional-social development of the individual in later ages. Therefore, necessary precautions should be taken in the early period. Thus, this study aimed to examine the relationship between high school students' aggression levels and peer pressure in Sivas.
Material and Method: A total of 993 students were included in this analytical cross-sectional study. The data of the study were collected by Peer Pressure Scale, Aggression Scale and personal information form. The data were evaluated by SPPS version 21. Frequency tables and descriptive statistics were used in the interpretation of the findings.
Results: It was determined that 48.6% of the students within the scope of the research are 15 years old; 41.7% of them have good school success; 96.8% did not have grade repetition; 85.4% of them do not have a health problem; 89.3% of them have positive friendship relations; 37.4% of them actively participated in socio-cultural activities; 77% of them respect each other in their friend attitudes; 86.3% did not smoke; 6.8% of them smoked 2-10 cigarettes a day. The average score the students got from the peer pressure scale is 52.68 ± 21.65; the mean score of the aggression scale was determined to be 129.82 ± 24.11.
Conclusion: This study revealed a strong correlation between peer pressure and aggression among high school students. While peer pressure and the aggression of the students were shown to be affected significantly by sex, school success, repeated grade level, health issue, peer relations, participation to the social activities, attitude of peers, smoking; it is shown that the age, maternal age and education level of the mother, paternal age and the level of education, type of family and attitude of the family did not seem to have an impact on these.