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Spatial frequencies underlying upright and inverted face identification

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dc.contributor.author Willenbockel, Verena
dc.date.accessioned 2008-07-03T17:05:54Z
dc.date.available 2008-07-03T17:05:54Z
dc.date.copyright 2008 en_US
dc.date.issued 2008-07-03T17:05:54Z
dc.identifier.uri http://hdl.handle.net/1828/1017
dc.description.abstract The face inversion effect (FIE; Yin, 1969) raises the question of whether upright face identification is mediated by a special mechanism that is disrupted by inversion. The present study investigates the effect of face inversion on the perceptual encoding of spatial frequency (SF) information using a novel variant of the Bubbles technique (Gosselin & Schyns, 2001). In Experiment 1, the SF Bubbles technique was validated using a simple plaid detection task. In Experiment 2, SF tuning of upright and inverted face identification was measured. While the data showed a clear FIE (28% higher accuracy and 455 ms shorter reaction times for upright faces), SF tunings were remarkably similar in both conditions (r = .96; a single SF band of ~2 octaves peaking at ~9 cycles per face width). Experiments 3 and 4 demonstrated that SF Bubbles is sensitive to bottom-up and top-down induced changes in SF tuning, respectively. Overall, the results show that the same SFs are utilized in upright and inverted face identification, albeit not with equal efficiency. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.subject spatial frequency en_US
dc.subject face recognition en_US
dc.subject inversion effect en_US
dc.subject.lcsh UVic Subject Index::Humanities and Social Sciences::Psychology::Cognitive psychology en_US
dc.title Spatial frequencies underlying upright and inverted face identification en_US
dc.type Thesis en_US
dc.contributor.supervisor Tanaka, James
dc.degree.department Dept. of Psychology en_US
dc.degree.level Master of Science M.Sc. en_US


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