Developing a Multilevel Model of the Interaction Between Intrinsic Motivation and Dark Personality Traits in the Formation of Chronic Aggressive Behaviors
Keywords:
Intrinsic Motivation, Dark Personality Traits, Dark Triad, Chronic Aggressive Behavior, Multilevel Model, University StudentsAbstract
Introduction and Aim: Chronic aggressive behavior is a significant psychological and social problem influenced by personality, motivational, and contextual factors. The present study aimed to develop and test a multilevel model explaining chronic aggressive behavior based on the interaction between intrinsic motivation and dark personality traits among university students in Tehran.
Methodology: This correlational study employed a multilevel structural equation modeling approach. The statistical population consisted of university students in Tehran during the 2026 academic year. A total of 520 participants were selected through multistage cluster sampling, and data from 503 participants were retained after data screening procedures. Research instruments included the Academic Motivation Scale, the Short Dark Triad Questionnaire (SD3), and the Buss–Perry Aggression Questionnaire. Data were analyzed using SPSS-27 and AMOS-26 through descriptive statistics, Pearson correlation analysis, confirmatory factor analysis, structural equation modeling, and multilevel analysis.
Findings: The results indicated that intrinsic motivation was negatively associated with dark personality traits (r = -0.41, p < 0.001) and chronic aggressive behavior (r = -0.46, p < 0.001). Dark personality traits showed a significant positive relationship with chronic aggressive behavior (r = 0.58, p < 0.001). The structural model demonstrated satisfactory fit indices (CFI = 0.95, RMSEA = 0.051). Path analysis revealed that intrinsic motivation had a significant negative direct effect on chronic aggressive behavior (β = -0.31, p < 0.001), whereas dark personality traits had a significant positive direct effect (β = 0.49, p < 0.001). Furthermore, the interaction between intrinsic motivation and dark personality traits significantly predicted chronic aggressive behavior (β = -0.18, p < 0.001). The final model explained 52.4% of the variance in chronic aggressive behavior.
Conclusion: The findings suggest that dark personality traits constitute a major risk factor for chronic aggressive behavior, whereas intrinsic motivation functions as a protective factor. Moreover, intrinsic motivation weakens the adverse impact of dark personality traits on aggression, highlighting its potential role in prevention and intervention programs aimed at reducing chronic aggressive behaviors among university students.
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