Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery

Abstract Crowding, the failure to identify a peripheral item in clutter, is an essential bottleneck in visual information processing. A hallmark characteristic of crowding is the inner–outer asymmetry in which the outer flanker (more eccentric) produces stronger interference than the inner one (clos...

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Autores principales:	Adi Shechter, Amit Yashar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/56c24257d4ca4727acf20f229374b31d
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spelling	oai:doaj.org-article:56c24257d4ca4727acf20f229374b31d2021-12-02T10:49:16ZMixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery10.1038/s41598-021-81533-92045-2322https://doaj.org/article/56c24257d4ca4727acf20f229374b31d2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81533-9https://doaj.org/toc/2045-2322Abstract Crowding, the failure to identify a peripheral item in clutter, is an essential bottleneck in visual information processing. A hallmark characteristic of crowding is the inner–outer asymmetry in which the outer flanker (more eccentric) produces stronger interference than the inner one (closer to the fovea). We tested the contribution of the inner-outer asymmetry to the pattern of crowding errors in a typical radial crowding display in which both flankers are presented simultaneously on the horizontal meridian. In two experiments, observers were asked to estimate the orientation of a Gabor target. Instead of the target, observers reported the outer flanker much more frequently than the inner one. When the target was the outer Gabor, crowding was reduced. Furthermore, when there were four flankers, two on each side of the target, observers misreported the outer flanker adjacent to the target, not the outermost flanker. Model comparisons suggested that orientation crowding reflects sampling over a weighted sum of the represented features, in which the outer flanker is more heavily weighted compared to the inner one. Our findings reveal a counterintuitive phenomenon: in a radial arrangement of orientation crowding, within a region of selection, the outer item dominates appearance more than the inner one.Adi ShechterAmit YasharNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Adi Shechter Amit Yashar Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery
description	Abstract Crowding, the failure to identify a peripheral item in clutter, is an essential bottleneck in visual information processing. A hallmark characteristic of crowding is the inner–outer asymmetry in which the outer flanker (more eccentric) produces stronger interference than the inner one (closer to the fovea). We tested the contribution of the inner-outer asymmetry to the pattern of crowding errors in a typical radial crowding display in which both flankers are presented simultaneously on the horizontal meridian. In two experiments, observers were asked to estimate the orientation of a Gabor target. Instead of the target, observers reported the outer flanker much more frequently than the inner one. When the target was the outer Gabor, crowding was reduced. Furthermore, when there were four flankers, two on each side of the target, observers misreported the outer flanker adjacent to the target, not the outermost flanker. Model comparisons suggested that orientation crowding reflects sampling over a weighted sum of the represented features, in which the outer flanker is more heavily weighted compared to the inner one. Our findings reveal a counterintuitive phenomenon: in a radial arrangement of orientation crowding, within a region of selection, the outer item dominates appearance more than the inner one.
format	article
author	Adi Shechter Amit Yashar
author_facet	Adi Shechter Amit Yashar
author_sort	Adi Shechter
title	Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery
title_short	Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery
title_full	Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery
title_fullStr	Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery
title_full_unstemmed	Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery
title_sort	mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/56c24257d4ca4727acf20f229374b31d
work_keys_str_mv	AT adishechter mixturemodelinvestigationoftheinnerouterasymmetryinvisualcrowdingrevealsaheavierweighttowardsthevisualperiphery AT amityashar mixturemodelinvestigationoftheinnerouterasymmetryinvisualcrowdingrevealsaheavierweighttowardsthevisualperiphery
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Mixture model investigation of the inner–outer asymmetry in visual crowding reveals a heavier weight towards the visual periphery

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