Purpose
The purpose of this study was to construct a structural model that explains the factors affecting aggression among elementary school students and to verify their suitability.
Methods
The study period was from June to August 2018. The study subjects were fifth- and sixth- graders at an elementary school. In total, 291 surveys were collected, of which 259 were analyzed. Data were analyzed using SPSS version 24.0 and AMOS version 24.0.
Results
The fit of the final model was acceptable (x²=160.08 [p<.001], GFI=.921, AGFI=.869, CFI=.919, SRMR=.057, and RMSEA=.086). Thus, eight of the 10 hypotheses were shown to be statistically significant.
Conclusion
The results of this study indicate that positive and open parenting behaviors and training children to engage in self-control are needed to reduce their aggression. In addition, considerable attention and education are required in the home, school, and society so that children can learn to properly recognize and express their emotions and establish suitable beliefs regarding aggressive behavior.

Purpose
This study was conducted to develop a scale for measuring aggression in adolescents, based on Ajzen's Theory of Planned Behavior (TPB).
Methods
The participants were 38 adolescents in an in-depth study conducted to develop items for indirect measurement, 13 adolescents in a pre-test, and 289 adolescents in the present survey. The collected data were analyzed using content validity, the correlation coefficient, exploratory factor analysis, confirmatory factor analysis, reliability, and the Cronbach's ⍺.
Results
In this study, the most important variable related to aggression was found to be aggression intention. This study included 4 factors of direct measurement and 6 factors of indirect measurement; therefore, 41 questions were developed. Increased levels of aggression were associated with higher scores for attitudes of aggression, subjective norms, perceived behavioral control, and aggression intention.
Conclusion
We found that the questionnaire used in this study was valid and reliable as a measurement scale to explain aggression in adolescents based on TPB. Aggression intention should be included in aggression prevention programs because it was linked to aggressive behavior.

Citations

• Development and Psychometric Evaluation of the Tehran Adolescent Aggression Scale: A Mixed-Methods Study
  Shahrzad Sanjari, Abbas Tavan, Hamidrezaa Abbasi, Azita Salajegheh, Mohammad Reza Mohammadi Soliemani, Leila Bayat Mokhtari
  Iranian Journal of Psychiatry and Behavioral Scien.2025;[Epub]     CrossRef
• A Structural Model for Aggression in Middle School Students in Korea: Based on Ajzen’s Theory of Planned Behavior
  Sook Jang, Hye Young Ahn
  International Journal of Environmental Research an.2023; 20(2): 1576.     CrossRef