Recent research using TF analysis has suggested that two processes underlie performance feedback event-related potentials (ERPs): a reward sensitive process in the delta range
(delta-reward positivity; 0-3 Hz) and a loss sensitive process in the theta range (theta-feedback negativity; 3-7 Hz). In addition to being sensitive to gain outcomes, delta-RP appears to be
sensitive to more complex reward context information, such as alternative outcomes and reward magnitude. The current study evaluated delta-RP with respect to reward history, a previously
unassessed example of reward context information. Reward history considers trial sequence context and the specific reward outcomes on previous trials, relative to the current trial. The
current study assessed the extent to which delta-RP is not only sensitive to primary feedback (i.e. current outcome), but also reward history, Further, the current study evaluated whether
theta-FN is best characterized as a loss sensitive index of primary feedback characteristics. A college sample (N=43) completed a common gambling task, while EEG data was recorded. TF-PCA was
utilized to parse overlapping delta and theta activity during the the traditional time-domain FN-P300 period. Delta-RP was sensitive to both current trial reward feedback and more distal
reward feedback. The current study determined that delta-RP linearly scaled with the amount of overall reward accumulated over the course of two trials. Theta-FN was primarily sensitive to
the current trial outcome with greater activity in response to loss feedback. Further, analysis of behavioral correlates suggested that consecutive loss feedback resulted in a decrease in
subsequent reaction time. Overall, results suggest that delta-RP may be a dynamic index of more complex reward information. / A Thesis submitted to the Department of Psychology in partial fulfillment of the requirements for the degree of Master of Science. / Fall Semester, 2014. / July 31, 2014. / EEG, feedback negativity, gambling, psychophysiology, reward positivity, reward processing / Includes bibliographical references. / Norman B. Schmidt, Professor Directing Thesis; Thomas Joiner, Committee Member; Walter Boot, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_252853 |
| Contributors | Kothur, Srikant R. (authoraut), Schmidt, Norman B. (professor directing thesis), Joiner, Thomas (committee member), Boot, Walter Richard (committee member), Florida State University (degree granting institution), College of Arts and Sciences (degree granting college), Department of Psychology (degree granting department) |
| Publisher | Florida State University, Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource (59 pages), computer, application/pdf |
| Rights | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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