Reinforcement sensitivity and tripartite authenticity in the prediction of aggressiveness

The primary aim of this study was to examine personality traits (from the revised Reinforcement Sensitivity Theory) and authenticity (according to the tripartite conception) as predictors of aggressiveness (anger, vengefulness, dominance, and hostility), as well as to determine the interaction effects of authenticity on the relationship between personality traits and aggressiveness. The sample comprised 460 participants (82.8% female, Mage = 25). Findings showed rRST traits, particularly the Behavioral Inhibition System (BIS) and Behavioral Activation System (BAS), significantly predict individual differences in authenticity, with a low BIS and high BAS combination proving optimal for authentic living. Authenticity dimensions, such as self-alienation and acceptance of external influences, also emerged as significant predictors of various aggressiveness dimensions. Crucially, moderation analyses revealed that authenticity complexly modulates the associations between rRST traits and aggressiveness. These interactions demonstrated nuanced effects; for example, authenticity could intensify anger responses to defensive behaviors or redirect BAS-driven energy towards dominance when authentic living was low. This research offers significant insights into the intricate interplay between reinforcement sensitivity, authenticity, and aggressiveness, enriching theoretical understanding and suggesting potential avenues for future research.