Because trust-related issues inherently involve uncertainty, we expected individuals' socialcognitive motivation to manage uncertainty -which is captured by their need for closure -to influence their level of trust in others. Through the results of six studies, we showed that higher need for closure was related to more polarized trust judgments (i.e., low trust in distant others and high trust in close others) in the case of both chronic and situational need for closure. Moreover, participants with high need for closure did not revise their level of trust when they received feedback about the trustees' actual trustworthiness, whereas participants with low need for closure did. Overall, our findings indicate that polarized (either high or low, as opposed to moderate) and persistent levels of trust may serve people's seizing and freezing needs for achieving cognitive closure.
Keywords: Need for closure, trust, uncertainty, interpersonal closenessNeed for closure and trust 3 Trusting others: The polarization effect of need for closure Trust is indispensable to all social relations. The presence of trust results in important benefits to both trustors and trustees at multiple levels (Kosfeld, Heinrichs, Zak, Fischbacher, & Fehr, 2005). For example, at the individual level, trust helps people to feel more secure (Erikson, 1950), to feel less unhappy or less maladjusted (Rotter, 1980), and to cope better with distress (Schill, Toves, & Ramanaiah, 1980). At the interpersonal level, trust enhances cooperation (McAllister, 1995) and information sharing (Butler, 1999). At the organizational level, trust reduces transaction costs (Barney & Hansen, 1994) and facilitates alliances (Uzzi, 1997). Finally, at the societal level, trust fosters solidarity (Misztal, 1996), prosperity (Fukuyama, 1995), and economic growth (Knack & Keefer, 1997;Zak & Knack, 2001).Consequently, many scholars (e.g., Arrow, 1974;Luhmann, 1979) conceptualize trust as a key lubricant of social life. However, although justified (i.e., non-violated) trust benefits all parties involved, trust also entails the risk of betrayal. Trust implies a situation in which one person (i.e., the trustor) chooses to rely on another (i.e. the trustee) without knowing what the exact consequences of doing so will be (Gambetta, 1988;Huang & Murnighan, 2010). Whether the trustee is a family member, a friend, or a business partner, it is always uncertain a priori whether one's trust in that person will prove to be justified. This fact raises the question of how individual differences in handling this uncertainty affect individuals' trust in others. In the present research, we argue and show that individuals' level of trust in others is a function of their cognitive-motivational differences in managing ambiguity and uncertainty. These differences are captured by individuals' varying levels of need for closure, which refers to a chronic or temporary tendency to avoid or to feel the need to resolve uncertainty and ambiguity . We further reason and demonstrate that the effe...