Impulsivity is a stable personality trait associated with myopic choice behavior that favors immediate rewards over larger, delayed rewards and is often characterized as maladaptive inside and outside of the laboratory. An alternative view suggests that the consequences of trait impulsivity depend on the nature of the task environment. On this view, the optimal level of impulsivity varies across task payoff structures. This hypothesis is tested in two dynamic decision-making tasks that differ in the relative payoffs of delayed and immediate rewards. In a task that favors delayed rewards to immediate rewards, high-impulsive participants perform worse than low-impulsive participants. In contrast, in a task that favors immediate rewards over delayed rewards, high-impulsive participants outperform low-impulsive participants. These results suggest a more nuanced conceptualization of trait impulsivity as it applies to rewards-related decision making that may help explain the variability observed in this trait across individuals.
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