An event-related potentials investigation of semantic access during thought suppression

dc.contributor.advisorEisenberg, Ann
dc.contributor.authorGiuliano, Ryan J.
dc.contributor.committeeMemberWicha, Nicole Y.
dc.contributor.committeeMemberSmith, Rebekah
dc.date.accessioned2024-02-09T21:11:41Z
dc.date.available2024-02-09T21:11:41Z
dc.date.issued2009
dc.descriptionThis item is available only to currently enrolled UTSA students, faculty or staff. To download, navigate to Log In in the top right-hand corner of this screen, then select Log in with my UTSA ID.
dc.description.abstractThe paradoxical effects of thought suppression were first demonstrated in an experiment that found that thoughts of a white bear were more likely to recur for people who initially suppressed thoughts of a white bear than for people who initially expressed such thoughts (Wegner, Schneider, Carter, & White, 1987). Recent findings suggest that this rebound effect is due to the simultaneous facilitation of associative pathways leading towards and away from the suppressed thought (Najmi & Wegner, 2008). The following study used event-related potentials (ERPs) to investigate the semantic activation of individual words during thought suppression. Participants were asked to suppress or express thoughts of a focus word during a simple lexical decision task (LDT), while brain responses were measured, time-locked to focus and distracter words. Modulations in the N400 component, an index of word activation, demonstrated an ironic increase in focus word activation during and after suppression periods relative to expression, although earlier differences in the N1 window suggest that expression elicited greater perceptual processing than suppression. A P300 effect was also observed which was larger for focus words than distracter or non-words, implying that focus words were treated as targets in the LDT, although non-words were the only stimuli requiring a manual response. Overall, results demonstrate the paradoxical effects of thought suppression occurring at the level of semantic access.
dc.description.departmentPsychology
dc.format.extent47 pages
dc.format.mimetypeapplication/pdf
dc.identifier.isbn9781109123289
dc.identifier.urihttps://hdl.handle.net/20.500.12588/3550
dc.languageen
dc.subjectelectrophysiology
dc.subjectERP
dc.subjectevent-related potentials
dc.subjectN400
dc.subjectsemantic access
dc.subjectthought suppression
dc.subject.classificationPhysiological psychology
dc.subject.classificationNeurosciences
dc.subject.lcshThought suppression
dc.subject.lcshIntrusive thoughts
dc.subject.lcshEvoked potentials (Electrophysiology)
dc.titleAn event-related potentials investigation of semantic access during thought suppression
dc.typeThesis
dc.type.dcmiText
dcterms.accessRightspq_closed
thesis.degree.departmentPsychology
thesis.degree.grantorUniversity of Texas at San Antonio
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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