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Reward Reactivity and Impulsivity

Introduction This summer, I would like to examine the relationship between reward reactivity and impulsivity using unanalyzed data recently collected by graduate students in my lab. Impulsivity is the tendency towards rapid reactions to stimuli without considering negative consequences of those reactions (Moeller & Barratt, 2001). Impulsivity has consequences for our understanding of psychiatric disorder: high impulsivity has been linked to several psychiatric disorders, including substance addiction and bipolar disorder (Swann et al, 2004). Reward-reactivity represents how people engage with and process reward-related feedback. Reward-reactivity has been linked to several clinical populations: reward reactivity is decreased in depressive populations (Naranjo 2001) and increased in bipolar populations (Nusslock 2012). It is hypothesized that highly impulsive people will display enhanced reward-reactivity, because impulsive people tend to over-engage with the reward in front of them, suggesting enhanced reactivity to immediate reward (Moeller & Barratt, 2001). In sum, my research attempts to answer this question: Does reward-reactivity related electrical activity in the brain reliably index impulsivity?