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dc.contributor.advisorCowan, Nelsoneng
dc.contributor.authorChen, Zhijian, 1972-eng
dc.date.issued2009eng
dc.date.submitted2009 Summereng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on Feb 26, 2010).eng
dc.descriptionThe entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.eng
dc.descriptionDissertation advisor: Dr. Nelson Cowan.eng
dc.descriptionVita.eng
dc.descriptionPh.D. University of Missouri--Columbia 2009.eng
dc.description.abstractCowan's K (Cowan, 2001) is an effective measure of visual working memory capacity and has been widely accepted by working memory researchers in recent years. However, one fundamental assumption of this measure, so called the all-or-none assumption (i.e., an observer either remembers everything or nothing about a visual stimulus), could be over-simplified and thus impose validity boundaries for Cowan's K. Little has been done to examine the potential limitations of the assumption in terms of its impact on Cowan's K. As an attempt to fill this gap in the literature, the present project explored the boundary conditions of Cowan's K. The results suggest that the all-or-none assumption is fairly robust across different test procedures, as long as the visual stimuli are simple and familiar. When complex and novel stimuli were used, however, the all-or-none assumption led to significant discrepancies across different test procedures. A revision of Cowan's K formulation was proposed to account for visual working memory performance with both simple and complex stimuli. An interesting observation of experiment participants' non-rational strategy use was also reported.eng
dc.description.bibrefIncludes bibliographical referenceseng
dc.format.extentviii, 81 pageseng
dc.identifier.oclc589331417eng
dc.identifier.urihttps://hdl.handle.net/10355/7013
dc.identifier.urihttps://doi.org/10.32469/10355/7013eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.rightsOpenAccess.eng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.
dc.subject.lcshShort-term memory -- Mathematical modelseng
dc.subject.lcshBoundary value problemseng
dc.titleBoundary conditions for a visual working memory capacity modeleng
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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