Unexpected 'all or none' processing utilized by executive systems when working memory and inhibitory control requirements increased

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dc.contributor.authorFrazer, Jeff
dc.contributor.supervisorKerns, Kimberly A.
dc.date.accessioned2008-06-03T17:19:50Z
dc.date.available2008-06-03T17:19:50Z
dc.date.copyright2007en_US
dc.date.issued2008-06-03T17:19:50Z
dc.degree.departmentDept. of Psychologyen_US
dc.degree.levelMaster of Science M.Sc.en_US
dc.description.abstractThe “All-or-None Hypothesis (ANH)” (Diamond, 2005; 2006) was examined, positing that executive systems process information and respond to the environment using global heuristics, versus a more piecemeal approach. 104 adults were tested on two novel paradigms designed to uniquely test the ANH. Working Memory (WM) and Inhibitory Control (IC) demands were manipulated, to test the impact of these task demands. Performance measured by reaction times and accuracy on both paradigms provided some support for the ANH. However, this effect was greatest when participants required ‘executive-type’ inhibition, versus ‘motor-type’ inhibition to suppress a response. Further, increasing the WM load increased the ANH trend, while varying the IC requirements had little effect. To our knowledge this is the first direct test of Diamond’s ANH, and extended its specificity in terms of task demands.en_US
dc.identifier.urihttp://hdl.handle.net/1828/962
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectexecutive controlen_US
dc.subjectworking memoryen_US
dc.subjectinhibitory controlen_US
dc.subjectall or noneen_US
dc.subject.lcshUVic Subject Index::Humanities and Social Sciences::Psychology::Cognitive psychologyen_US
dc.titleUnexpected 'all or none' processing utilized by executive systems when working memory and inhibitory control requirements increaseden_US
dc.typeThesisen_US

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