تکانشگری در تصمیم گیری: بررسی پتانسیل مربوط به رویداد

Impulsive individuals make risky choices, motivated more by immediate reward than potential long-term negative consequences. We used event-related potentials (ERPs) to study the impact of reward and punishment sensitivity in impulsivity on risky decision-making in a two-card choice task in groups of 14 high and 14 low impulsive undergraduates formed by a median split on the Barratt Impulsiveness Scale score. The high impulsives had a larger P3 and the low impulsives a smaller P3 to the cards when making a low-risk choice suggesting that the high-risk option was the default choice of the high impulsives and the low-risk choice the default for the low impulsives. The low, but not the high impulsives had a larger error-related negativity (ERN) following high-risk choice indicating that the low impulsives evaluated the risky choice as a poor decision. The results indicate that high impulsive individuals are biased towards immediate reward during option evaluation but are less sensitive to the negative consequences of their choices.

Impulsive individuals make risky decisions, choosing immediate rewards despite potential long-term negative consequences (Moeller, Barratt, Dougherty, Schmitz, & Swann, 2001). Decision-making consists of multiple operations including option evaluation and actions and outcome monitoring. The current study used event-related potentials (ERPs) in a two-card forced choice task between high- and low-risk/reward options in participants separated into high and low impulsive groups based on a median split on Barratt Impulsiveness Scale score (BIS-11; Patton, Stanford, & Barratt, 1995) to examine impulsivity related differences during the option evaluation and action and outcome monitoring stages of decision-making.