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dc.contributor.authorRahnev, Dobromir
dc.date.accessioned2017-03-02T17:22:05Z
dc.date.available2017-03-02T17:22:05Z
dc.date.issued2017-02-13
dc.identifier.urihttp://hdl.handle.net/1853/56478
dc.descriptionPresented on February 13, 2017 at 11:00 a.m. in the Engineered Biosystems Building (EBB), Room 1005en_US
dc.descriptionDobromir Rahnev is an Assistant Professor of Psychology at Georgia Tech. His research attempts to elucidate the brain mechanisms that influence what we perceive, as well as build computational models that explain current findings and lead to novel testable predictions.en_US
dc.descriptionRuntime: 52:34 minutesen_US
dc.description.abstractHow do humans and other animals make decisions? A large body of work has investigated this question in the perceptual domain where subjects make decisions about simple visual stimuli. A critical question concerns the “dynamics” of these decisions: how do they evolve over time and how do top-down processes influence them? In the first part of the talk, I’ll present evidence for the existence of a hierarchy of top-down control processes. These processes influence the selection, decision, and evaluation of visual stimuli and originate from progressively rostral areas within the human lateral frontal cortex. In the second part of the talk, I’ll describe recent work into the computations underlying perceptual decisions. I’ll argue that, contrary to popular theories such as drift diffusion and probabilistic population codes, perceptual decisions are based neither on point estimates nor on full probability distributions. Instead, they are likely based on hybrid representations that include a point estimate supplanted by strength of evidence for that estimate. Finally, I’ll discuss the implications of this coding scheme for human optimality.en_US
dc.format.extent52:34 minutes
dc.language.isoen_USen_US
dc.relation.ispartofseriesGT Neuro Seminar Seriesen_US
dc.subjectDecision makingen_US
dc.subjectFrontal cortexen_US
dc.subjectPerceptionen_US
dc.titleThe Dynamics of Perceptual Decision Makingen_US
dc.typeLectureen_US
dc.typeVideoen_US
dc.contributor.corporatenameGeorgia Institute of Technology. Neural Engineering Centeren_US
dc.contributor.corporatenameGeorgia Institute of Technology. School of Psychologyen_US


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