Potts, Geoffrey F.2009-06-042009-06-042004Martin, Laura E.. "Individual differences in decision-making and reward processing: An event-related potential investigation." (2004) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17705">https://hdl.handle.net/1911/17705</a>.https://hdl.handle.net/1911/17705Gambling paradigms tapping both reward processing and decision-making tasks in control and patient populations have found differences in behavior based on individual differences in immediate reward representation. The current investigation examined decision-making in individuals who differed on self-reported measures of impulsivity and used event-related potentials (ERPs) to examine the network dynamics of reward and decision-making circuitry among low and high impulsive participants. An inferior frontal component, the anterior P2 (P2a), indexing orbitofrontal cortex (OFC) activity, and a medial frontal negativity (MFN), indexing anterior cingulate cortex (ACC) activity, were measured related to choices made from high-risk and low-risk decks of cards in two modified versions of the Iowa Gambling Task. Results indicated that the P2a indexed reward expectation in a single-presentation version of the Iowa Gambling Task and the MFN indexed evaluation of decisions in a dual-presentation version of the Iowa Gambling Task.74 p.application/pdfengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.Experimental psychologyCognitive psychologyThesisTHESIS PSYCH. 2004 MARTIN