Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance

Abstract The perception of a target depends on other stimuli surrounding it in time and space. This contextual modulation is ubiquitous in visual perception, and is usually quantified by measuring performance on sets of highly similar stimuli. Implicit or explicit comparisons among the stimuli may,...

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Autores principales:	Fazilet Zeynep Yildirim, Daniel R. Coates, Bilge Sayim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ab688a8dddf34e62a7b1d29d5416c455
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spelling	oai:doaj.org-article:ab688a8dddf34e62a7b1d29d5416c4552021-12-02T14:03:59ZHidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance10.1038/s41598-021-83325-72045-2322https://doaj.org/article/ab688a8dddf34e62a7b1d29d5416c4552021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83325-7https://doaj.org/toc/2045-2322Abstract The perception of a target depends on other stimuli surrounding it in time and space. This contextual modulation is ubiquitous in visual perception, and is usually quantified by measuring performance on sets of highly similar stimuli. Implicit or explicit comparisons among the stimuli may, however, inadvertently bias responses and conceal strong variability of target appearance. Here, we investigated the influence of contextual stimuli on the perception of a repeating pattern (a line triplet), presented in the visual periphery. In the neutral condition, the triplet was presented a single time to capture its minimally biased perception. In the similar and dissimilar conditions, it was presented within stimulus sets composed of lines similar to the triplet, and distinct shapes, respectively. The majority of observers reported perceiving a line pair in the neutral and dissimilar conditions, revealing ‘redundancy masking’, the reduction of the perceived number of repeating items. In the similar condition, by contrast, the number of lines was overestimated. Our results show that the similar context did not reveal redundancy masking which was only observed in the neutral and dissimilar context. We suggest that the influence of contextual stimuli has inadvertently concealed this crucial aspect of peripheral appearance.Fazilet Zeynep YildirimDaniel R. CoatesBilge SayimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fazilet Zeynep Yildirim Daniel R. Coates Bilge Sayim Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance
description	Abstract The perception of a target depends on other stimuli surrounding it in time and space. This contextual modulation is ubiquitous in visual perception, and is usually quantified by measuring performance on sets of highly similar stimuli. Implicit or explicit comparisons among the stimuli may, however, inadvertently bias responses and conceal strong variability of target appearance. Here, we investigated the influence of contextual stimuli on the perception of a repeating pattern (a line triplet), presented in the visual periphery. In the neutral condition, the triplet was presented a single time to capture its minimally biased perception. In the similar and dissimilar conditions, it was presented within stimulus sets composed of lines similar to the triplet, and distinct shapes, respectively. The majority of observers reported perceiving a line pair in the neutral and dissimilar conditions, revealing ‘redundancy masking’, the reduction of the perceived number of repeating items. In the similar condition, by contrast, the number of lines was overestimated. Our results show that the similar context did not reveal redundancy masking which was only observed in the neutral and dissimilar context. We suggest that the influence of contextual stimuli has inadvertently concealed this crucial aspect of peripheral appearance.
format	article
author	Fazilet Zeynep Yildirim Daniel R. Coates Bilge Sayim
author_facet	Fazilet Zeynep Yildirim Daniel R. Coates Bilge Sayim
author_sort	Fazilet Zeynep Yildirim
title	Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance
title_short	Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance
title_full	Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance
title_fullStr	Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance
title_full_unstemmed	Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance
title_sort	hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ab688a8dddf34e62a7b1d29d5416c455
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Hidden by bias: how standard psychophysical procedures conceal crucial aspects of peripheral visual appearance

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