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dc.contributor.advisorMadden, Gregory J.
dc.contributor.authorBrewer, Adam Thornton
dc.date.accessioned2010-03-18T05:12:34Z
dc.date.available2010-03-18T05:12:34Z
dc.date.issued2009-12-16
dc.date.submitted2009
dc.identifier.otherhttp://dissertations.umi.com/ku:10663
dc.identifier.urihttp://hdl.handle.net/1808/6004
dc.description.abstractOn multiple schedules ending in two different magnitudes of reinforcement, a signaled transition from a preceding large (rich) to an upcoming small (lean) reinforcer occasions long post-reinforcer pauses compared to transitions from lean to rich, or when magnitude is constant (e.g., rich-rich and lean-lean transitions). A behavioral process that may underlie extended pausing at signaled rich-lean transitions is that these transitions are aversive and set the occasion for escape in the form of extended pausing. The present study evaluated this hypothesis by examining pausing at signaled rich-lean transitions in two inbred strains of rats putatively differing in sensitivity to aversive stimulation. Fischer 344 rats are more sensitive to aversive stimuli and so should pause longer than Lewis rats at the signaled transition from large to small reinforcers. Pausing was assessed at four different signaled transitions (rich-lean, rich-rich, lean-rich, and lean-lean) across a range of fixed-ratio values (1, 25, 50, 75, and 100). Consistent with the aversive transition hypothesis, Fischer 344 rats paused longer than Lewis rats at signaled rich-lean transitions at most ratio values. Control procedures suggest this difference is not due to motoric differences between rat strains.
dc.format.extent46 pages
dc.language.isoEN
dc.publisherUniversity of Kansas
dc.rightsThis item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
dc.subjectBehavioral psychology
dc.subjectBiology
dc.subjectNeurosciences
dc.subjectExperimental psychology
dc.subjectFischer 344 rats
dc.subjectFixed-ratio schedules of reinforcement
dc.subjectLewis rats
dc.subjectNegative incentive shifts
dc.subjectPausing
dc.subjectTransitions
dc.titleA Test of the Aversive Transition Account: Extended Pausing Following Signaled Rich-Lean Transitions on Multiple Fixed-Ratio Schedules in Fischer 344 and Lewis Rats
dc.typeThesis
dc.contributor.cmtememberWilliams, Dean C.
dc.contributor.cmtememberSaunders, Kathryn J.
dc.contributor.cmtememberMorris, Edward K.
dc.thesis.degreeDisciplineApplied Behavioral Science
dc.thesis.degreeLevelM.A.
kusw.oastatusna
kusw.oapolicyThis item does not meet KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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