Proceedings of the Annual Meeting of the Cognitive Science Society

Across diverse cognitive and behavioral domains, humans confront a fundamental tension between exploiting currentknowledge about the environment and exploring the environment in order to acquire new knowledge. Individuals differ idiosyn-cratically in how they balance this explore/exploit tradeoff, although the sources of these individual differences have not beensystematically studied. In the current study, we sought to do so, in terms of trait-level affective phenotypes. Specifically, weinvestigated whether intolerance to uncertainty (IU), characterized by a negative disposition toward uncertainty, predicted bothrandom and directed exploration in a two-armed bandit task which manipulated decision horizon. We found that greater IU wasassociated with diminished exploration, both random (p<0.001) and directed (p<0.05). These results suggest the importanceof explicitly considering affective states and dispositions in human decision-making and also have psychiatric implications, tothe extent that IU is a transdiagnostic dimension central to a range of anxiety-related disorders.