LAUSR

Abstract Research in unethical behaviour has highlighted the role of moral disengagement as one of its main predictors. Even though extant research has studied trait moral disengagement in the context of Big Five personality domains, no studies have explored the contribution of within- domain aspects. In three studies (N = 663) we found associations between Big Five personality factors and moral disengagement that highlight the primary role of Agreeableness (and its aspects politeness and compassion), but also implicate assertiveness and volatility. Furthermore, we found that moral disengagement significantly accounted for the effects of domains Agreeableness and Openness/Intellect, and aspects politeness, compassion, volatility, enthusiasm, assertiveness, and openness on unethical decision-making. In sum, these findings provide valuable insight into the role that Big Five personality domains and aspects play in the deployment of moral disengagement and help us to understand how the latter may account for the relationships between Big Five personality traits and unethical decision- making.