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dc.contributor.advisorRouder, Jeffrey Neil, 1966-eng
dc.contributor.authorSwagman, Aprileng
dc.date.issued2016eng
dc.date.submitted2016 Summereng
dc.descriptionDissertation supervisor: Dr. Jeffrey N. Rouder.eng
dc.descriptionIncludes vita.eng
dc.description.abstractBayesian ideal observer theory describes perception as an ideal integration of sensory information with prior knowledge to produce optimal responses. Bayesian ideal perception models are popular in sensory domains; however, these models often prove unfalsifiable because of excessive distributional assumptions and post-hoc estimation of participant beliefs. Three visual perception tasks were designed to test Bayesian ideal observer theory under minimal assumptions using the Bayesian Decision Theory framework. Prior distributions of stimuli were specified, likelihoods were manipulated across four stimulus reliability levels, and loss functions were established so that participants could choose posterior point estimates which minimize loss. In each experiment, a Bayesian ideal observer model was fit against a Bayesian posterior matching model (adapted from the probability matching phenomenon) and one or more non-Bayesian mixture models. Results from two experiments in which participants were making location-based judgments overwhelmingly supported the posterior matching models. Data from a third experiment in which participants made estimations about the number of items in an array were fit best by a non-Bayesian mixture model. Overall, Bayesian ideal observer theory was not supported in three experiments of visual perception.eng
dc.description.bibrefIncludes bibliographical references (pages 128-134).eng
dc.format.extent1 online resource (xvii, 135 pages) : illustrationseng
dc.identifier.merlinb118952651eng
dc.identifier.oclc994210776eng
dc.identifier.urihttps://hdl.handle.net/10355/57274
dc.identifier.urihttps://doi.org/10.32469/10355/57274eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.rightsOpenAccesseng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.eng
dc.subject.FASTVisual perceptioneng
dc.titleTesting the Bayesian brain hypothesis in visual perceptioneng
dc.typeThesiseng
thesis.degree.disciplinePsychology (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelDoctoraleng
thesis.degree.namePh. D.eng


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