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Mug Shots: Systematic Biases in the Perception of Facial Orientation within Pictorial Spaces

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dc.contributor.advisorTroje, Nikolaus
dc.contributor.authorEsser, Maxwell Jacob Rosenstein
dc.date.accessioned2023-12-08T14:26:06Z
dc.date.available2023-12-08T14:26:06Z
dc.date.issued2023-12-08
dc.date.updated2023-12-08T14:26:05Z
dc.degree.disciplineBiology
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractPictures are 2-D projections of a 3-D world, so pictorial spaces behave differently than the 3-D visual spaces we inhabit. For instance, the angular orientation of a face pictured in half-profile view is systematically overestimated by the human observer – a 35° view is estimated to be approximately 45°. What is the cause for this perceptual orientation bias? We tested three different hypotheses. (1) The phenomenon is specific to pictorial projections due to the twofoldness of the medium and does not occur in 3-D space. (2) It can be explained with the depth compression expected when the vantage point of the observer is closer to the picture than the point of projection. (3) The visual system uses a shape prior that does not match the elliptical horizontal cross section of a typical head. Our results support the third hypothesis, and this effect can be mitigated through adding geometric information through structure-from-motion.
dc.identifier.urihttps://hdl.handle.net/10315/41623
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectNeurosciences
dc.subject.keywordsVisual perception
dc.subject.keywordsPerception of facial orientation
dc.subject.keywordsFacial orientation bias
dc.subject.keywordsPicture perception
dc.subject.keywordsOrientation bias
dc.subject.keywordsDepth compression
dc.subject.keywordsDepth
dc.subject.keywordsTwofoldness
dc.subject.keywordsDepth cues
dc.subject.keywordsVisual space
dc.subject.keywordsPictorial space
dc.subject.keywordsProjective distortion
dc.titleMug Shots: Systematic Biases in the Perception of Facial Orientation within Pictorial Spaces
dc.typeElectronic Thesis or Dissertation

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