Thesis:

Predicting Relational Aggression Based on the Big Five Personality Traits and Childhood Trauma among Psychology Students at Payame Noor University of Mashhad

The present study aimed to predict relational aggression based on the Big Five personality traits and childhood trauma among psychology students at Payame Noor University of Mashhad. This research was fundamental in purpose, descriptive-correlational in method, quantitative in approach, and field-based in data collection. The statistical population consisted of all psychology students at Payame Noor University of Mashhad in the academic year 2024–2025 (N = 1,185). Based on Morgan’s sampling table, 288 students were selected through convenience sampling. The research instruments included the Childhood Trauma Questionnaire (CTQ) developed by Bernstein et al. (2003), the Aggression Questionnaire by Buss and Perry (1992), and the NEO Five-Factor Inventory (NEO-FFI) developed by McCrae and Costa (1985). After data collection, analyses were conducted using SPSS software at both descriptive and inferential levels (Pearson correlation and regression analysis). The findings indicated that relational aggression among psychology students at Payame Noor University of Mashhad could be significantly predicted by the Big Five personality traits and experiences of childhood trauma.

Keywords: Relational Aggression, Big Five Personality Traits, Childhood Trauma.