Big Five Personality Traits and Physical Aggression between Siblings in South Korea: an Actor-Partner Interdependence Analysis

The present study examined actor and partner effects of the Big Five personality traits, assessed by the NEO Five-Factor Inventory, on physical aggression within sibling dyadic interactions. Data were collected from 86 target adolescents receiving counseling services, their mothers, and closest-age siblings in South Korea. Mothers rated their children’s personalities. Target adolescents and siblings reported their own personality, as well as their sibling’s and their own perpetration of physical aggression against one another. Substantial self-other (i.e., mother and sibling) agreement was found for personality traits. Both actor and partner effects were found for the negative associations between extraversion, openness to experience, and conscientiousness and physical aggression among siblings. The current findings increase our understanding of personality traits implicated in physical aggression in general, and specifically aggression among siblings.