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dc.contributor.advisorMartin, Laura
dc.contributor.authorOwens, Tyler E.
dc.date.accessioned2016-01-03T03:48:42Z
dc.date.available2016-01-03T03:48:42Z
dc.date.issued2015-08-31
dc.date.submitted2015
dc.identifier.otherhttp://dissertations.umi.com/ku:13905
dc.identifier.urihttp://hdl.handle.net/1808/19552
dc.description.abstractResearch of impulsivity has most commonly address reward-focused behaviors, often overlooking facets of impulsivity related to negative affect and punishment avoidance. Though often viewed as distinct characteristics, common psychological and physiological vulnerabilities exist for impulsivity and negative mood. The diminished ability to delay immediate rewards to achieve long-term goals is a hallmark of impulsive behavior that frequently co-occurs with negative mood and results in many maladaptive health behaviors, such as anxiety, depression, and addiction. Using a delayed discounting paradigm paired with mood induction, we examined how Negative Urgency, a type of impulsivity related to negative affect, was related to delay discounting behaviors and shared neural substrates. Participants (N = 65) completed self-report measures of impulsivity and performed a delayed discounting task while experiencing negative and neutral mood induction. Additionally, a subset of participants (N = 17) performed the delay discounting task and mood induction while undergoing an fMRI scan. Participants were asked to read a series of neutral statements and negatively-valenced statements while listening to mood-congruent music. Following the mood induction, participants were shown a series of two monetary choices, each varying in magnitude in terms of value and time delay, and selected one of the choices based on their own preference. Results of the study showed that negative urgency was not significantly related to the rate at which participants discounted the value of future rewards behaviorally. Exploratory analyses did show possible relationships between other personality factors and delay discounting rates. FMRI results showed no main effect for negative mood, however an interaction between mood condition and choice type was observed, with activation shown in the right caudate nucleus. FMRI results with Negative Urgency were non-significant, though right ventrolateral prefrontal cortex activation was present when correlated with a measure of trait anxiety. Implications of these findings, limitations, and future directions are also discussed.
dc.format.extent103 pages
dc.language.isoen
dc.publisherUniversity of Kansas
dc.rightsCopyright held by the author.
dc.subjectPsychology
dc.subjectNeurosciences
dc.subjectAnxiety
dc.subjectDelay Discounting
dc.subjectImpulsivity
dc.subjectMood Induction
dc.subjectNegative Urgency
dc.titleEffect of Mood Induction and Negative Urgency on Delay Discounting Performance in fMRI
dc.typeDissertation
dc.contributor.cmtememberHamilton, Nancy
dc.contributor.cmtememberJarmolowicz, David
dc.contributor.cmtememberKirk, Sarah
dc.contributor.cmtememberSavage, Cary
dc.thesis.degreeDisciplinePsychology
dc.thesis.degreeLevelPh.D.
dc.rights.accessrightsopenAccess


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