The authors investigated the effects of voice--the opportunity to provide input in decision-making processes--on perceptions of procedural fairness. In particular, the authors studied the moderating role of social dominance orientation (SDO) in shaping this relation. SDO is an important individual differences variable that causes people to favor unequal relationships within and between social groups. Results revealed that voice was more strongly related to fairness judgments when participants had a high rather than low SDO. Moreover, positive affect mediated this moderation effect. The authors interpreted these results to indicate that high-SDO participants were especially sensitive to ...