摘要：Behavior of aggression is one of the troubled behaviors that teenagers do today. This is shown by teenagers by intentionally harming others, both physically and verbally. This research is quantitative descriptive research. The populations in this study are students of Muhammadiyah Vocational High School in Yogyakarta city amounted to 306 and the number of samples as many as 160 students. The result of data analysis shows that (1) very high category is 5%; (2) high category is 26%; (3) medium category is 40%; (4) low category is 21%; and (5) very low category is 8%.
关键词：Behavior of Aggression;Students of Vocational High School
