Feedback Related Negativity: Reward Prediction Error or Salience Prediction Error?

dc.contributor.authorHeydari, Sepideh
dc.contributor.supervisorHolroyd, Clay Brian
dc.date.accessioned2015-04-07T22:46:23Z
dc.date.available2015-04-07T22:46:23Z
dc.date.copyright2015en_US
dc.date.issued2015-04-07
dc.degree.departmentDepartment of Psychologyen_US
dc.degree.levelMaster of Science M.Sc.en_US
dc.description.abstractThe reward positivity is a component of the human event-related brain potential (ERP) elicited by feedback stimuli in trial-and-error learning and guessing tasks. A prominent theory holds that the reward positivity reflects a reward prediction error that is differentially sensitive to the valence of the outcomes, namely, larger for unexpected positive events relative to unexpected negative events (Holroyd & Coles, 2002). Although the theory has found substantial empirical support, most of these studies have utilized either monetary or performance feedback to test the hypothesis. However, in apparent contradiction to the theory, a recent study found that unexpected physical punishments (a shock to the finger) also elicit the reward positivity (Talmi, Atkinson, & El-Deredy, 2013). Accordingly, these investigators argued that this ERP component reflects a salience prediction error rather than a reward prediction error. To investigate this finding further, I adapted the task paradigm by Talmi and colleagues to a more standard guessing task often used to investigate the reward positivity. Participants navigated a virtual T-maze and received feedback on each trial under two conditions. In a reward condition the feedback indicated that they would either receive a monetary reward or not for their performance on that trial. In a punishment condition the feedback indicated that they would receive a small shock or not at the end of the trial. I found that the feedback stimuli elicited a typical reward positivity in the reward condition and an apparently delayed reward positivity in the punishment condition. Importantly, this signal was more positive to the stimuli that predicted the omission of a possible punishment relative to stimuli that predicted a forthcoming punishment, which is inconsistent with the salience hypothesis.en_US
dc.description.proquestcode0633en_US
dc.description.proquestcode0317en_US
dc.description.proquestemailheydari@uvic.caen_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/5956
dc.language.isoenen_US
dc.rights.tempAvailable to the World Wide Weben_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/ca/*
dc.subjectReinforcement Learningen_US
dc.subjectReward Positivityen_US
dc.subjectElecetroencephalographyen_US
dc.subjectEEGen_US
dc.subjectReward Prediction Erroren_US
dc.subjectSalience Prediction Erroren_US
dc.subjectPunishmenten_US
dc.subjectPainen_US
dc.titleFeedback Related Negativity: Reward Prediction Error or Salience Prediction Error?en_US
dc.typeThesisen_US

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