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BEHAVIORAL AND NEURAL EVIDENCE OF INCENTIVE BIAS FOR
IMMEDIATE REWARDS RELATIVE TO PREFERENCE-MATCHED DELAYED
REWARDS
by
Shan Luo
A Thesis Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF ARTS
(PSYCHOLOGY)
December 2009
Copyright 2009 Shan Luo
Object Description
| Title | Behavioral and neural evidence of incentive bias for immediate rewards relative to preference-matched delayed rewards |
| Author | Luo, Shan |
| Author email | shanluo@usc.edu; luoshanbest@gmail.com |
| Degree | Master of Arts |
| Document type | Thesis |
| Degree program | Psychology |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2009-09-21 |
| Date submitted | 2009 |
| Restricted until | Unrestricted |
| Date published | 2009-10-21 |
| Advisor (committee chair) | Monterosso, John R. |
| Advisor (committee member) |
Bechara, Antoine Lu, Zhong-Lin |
| Abstract | There are two classes of self-control models in behavioral science: “synchronic multiple selves” and “diachronic multiple selves”. The former class conceptualizes self-control struggle as competition between distinct motivation systems (economists call these “subagents” within the person.). The latter conceives self-control struggle as based on systematic inconsistency in preference over time (retaining the self as a unitary agent at any point in time). My master thesis comprises two papers. The first one reviews recent functional Magnetic Resonance Imaging (fMRI) work in the domain of intertemporal choice, specifically considering “synchronic multiple selves” hypothesis that delay discounting is determined by the competition between an evolutionarily older system that discounts precipitously with delay (System 1) and a newer system that exhibits very little discounting (System 2). I argue that neuroimaging evidences do not support this separate and competing valuation systems. Rather than acting as a competing value system, I argue that sophisticated cognitive capacities instantiated in the neocortex affect intertemporal choice through mediation of a single valuation system, instantiated within the extended limbic system.; The second paper is an empirical investigation of a prediction that is common to any theory of self-control that posits that one or more processes engaged specifically during decision-making results in increased attention to more far-sighted consequences. Specifically, I tested (and found support for) the hypothesis that intertemporal decisions are more farsighted than would be predicted by the incentive associated with immediate and delayed rewards encountered outside a decision context (that is, outside a context where self-control is engaged). |
| Keyword | self-control; decision-making; intertemporal choice; fMRI |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m2679 |
| Contributing entity | University of Southern California |
| Rights | Luo, Shan |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Luo-3335 |
| Archival file | uscthesesreloadpub_Volume26/etd-Luo-3335.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | BEHAVIORAL AND NEURAL EVIDENCE OF INCENTIVE BIAS FOR IMMEDIATE REWARDS RELATIVE TO PREFERENCE-MATCHED DELAYED REWARDS by Shan Luo A Thesis Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF ARTS (PSYCHOLOGY) December 2009 Copyright 2009 Shan Luo |
