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Title: Symmetry is less than meets the eye
Contributor(s): Apthorp, Deborah  (author)orcid ; Bell, Jason (author)
Publication Date: 2015-03-30
DOI: 10.1016/j.cub.2015.02.017
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Abstract: Symmetry is a ubiquitous feature in the visual environment and can be detected by a variety of species, ranging from insects through to humans 1, 2. Here we show it can also bias estimates of basic scene properties. Mirror (reflective) symmetry can be detected in as little as 50 ms, in both natural and artificial visual scenes, and even when embedded within cluttered backgrounds [1]. In terms of its biological relevance, symmetry is a key determinant in mate selection; the degree of symmetry in a face is positively associated with perceived healthiness and attractiveness ratings [3]. In short, symmetry processing mechanisms are an important part of the neural machinery of vision. We reveal that the importance of symmetry extends beyond the processing of shape and objects. Mirror symmetry biases our perception of scene content, with symmetrical patterns appearing to have fewer components than their asymmetric counterparts. This demonstrates an interaction between two fundamental dimensions of visual analysis: symmetry [1] and number [4]. We propose that this numerical underestimation results from a processing bias away from the redundant information within mirror symmetrical displays, extending existing theories regarding redundancy in visual analysis 5, 6.
Publication Type: Journal Article
Grant Details: ARC/DP110101511
Source of Publication: Current Biology, 25(7), p. R267-R268
Publisher: Cell Press
Place of Publication: United States of America
ISSN: 0960-9822
Field of Research (FOR): 170112 Sensory Processes, Perception and Performance
Socio-Economic Outcome Codes: 970106 Expanding Knowledge in the Biological Sciences
Peer Reviewed: Yes
HERDC Category Description: C4 Letter of Note
Appears in Collections:Journal Article
School of Psychology

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