Polygons have a small facilitatory effect on extraretinal symmetry perception

Karakashevska, Elena and Makin, Alexis DJ ORCID: 0000-0002-4490-7400 (2024) Polygons have a small facilitatory effect on extraretinal symmetry perception NEUROIMAGE, 302. 120894-. ISSN 1053-8119, 1095-9572

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Abstract

Symmetrical objects only project a symmetrical image onto the retina when viewed from certain angles. Previous work has investigated the ERP response to visual symmetry in frontoparallel and perspective views. When participants are attending to regularity, the ERPs are the same. When participants are attending to colour, the response to perspective symmetry is reduced. We term this reduction ‘perspective cost’. We predicted that perspective cost would be lessened if the stimuli were polygons rather than dot patterns. This prediction was confirmed in a new experiment. This result suggests some stimuli may support automatic 3D interpretation better than others. However, the facilitatory effect of polygons was relatively small, and perspective cost was not eliminated. Furthermore, this study also revealed that attention to symmetry is not always sufficient to eliminate perspective cost.

Item Type:	Article
Uncontrolled Keywords:	Symmetry, Perceptual constancy, View invariance, Sustained posterior negativity, EEG
Divisions:	Faculty of Health & Life Sciences Faculty of Health & Life Sciences > Inst. Population Health
Depositing User:	Symplectic Admin
Date Deposited:	08 Nov 2024 16:53
Last Modified:	22 May 2026 16:04
DOI:	10.1016/j.neuroimage.2024.120894
Open Access URL:	https://doi.org/10.1016/j.neuroimage.2024.120894
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3187225
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