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Object perception: separating the contributions of high and low level visual processes with event related brain potentials

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dc.contributor.author Piatt, Carley Graceanna
dc.date.accessioned 2009-12-17T17:07:26Z
dc.date.available 2009-12-17T17:07:26Z
dc.date.copyright 2006 en
dc.date.issued 2009-12-17T17:07:26Z
dc.identifier.uri http://hdl.handle.net/1828/1995
dc.description.abstract Object recognition was studied by combining a continuous presentation paradigm and event related potentials (ERPs). Using the Random Image Structure Evolution program (RISE), the phase spectrum of object images was parametrically altered to produce a set of continuous noise-to-object sequences. The RISE technique controlled for the low level visual properties of the object image (i.e., luminance, contrast, spatial frequency). Although the stimulus transformation proceeded continuously and smoothly, perceptually, participants reported the abrupt onset of object recognition, distinct from noise, at a critical frame in the sequence. During electrophysiological recording, the critical onset frame was marked by increased activity in posterior-occipital and central-parietal components between 152 and 324 ms post stimulus onset of the critical frame. More broadly, this study also highlights the strength of the continuous presentation paradigm for investigating object adaptation effects with ERPs. en
dc.language English eng
dc.language.iso en en
dc.rights Available to the World Wide Web en
dc.subject visual perception en
dc.subject.lcsh UVic Subject Index::Humanities and Social Sciences::Psychology en
dc.title Object perception: separating the contributions of high and low level visual processes with event related brain potentials en
dc.type Thesis en
dc.contributor.supervisor Tanaka, James William
dc.degree.department Dept. of Psychology en
dc.degree.level Master of Science M.Sc. en


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