Distance estimation is influenced by encoding conditions.

<h4>Background</h4>It is well established that foveating a behaviorally relevant part of the visual field improves localization performance as compared to the situation where the gaze is directed elsewhere. Reduced localization performance in the peripheral encoding conditions has been a...

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Autores principales:	Anna Oleksiak, Mirosława Mańko, Albert Postma, Ineke J M van der Ham, Albert V van den Berg, Richard J A van Wezel
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2010
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4cc9b2f91cd548f89a6eef5050be4d82
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spelling	oai:doaj.org-article:4cc9b2f91cd548f89a6eef5050be4d822021-11-25T06:24:59ZDistance estimation is influenced by encoding conditions.1932-620310.1371/journal.pone.0009918https://doaj.org/article/4cc9b2f91cd548f89a6eef5050be4d822010-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20360953/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>It is well established that foveating a behaviorally relevant part of the visual field improves localization performance as compared to the situation where the gaze is directed elsewhere. Reduced localization performance in the peripheral encoding conditions has been attributed to an eccentricity-dependent increase in positional uncertainty. It is not known, however, whether and how the foveal and peripheral encoding conditions can influence spatial interval estimation. In this study we compare observers' estimates of a distance between two co-planar dots in the condition where they foveate the two sample dots and where they fixate a central dot while viewing the sample dots peripherally.<h4>Methodology/principal findings</h4>Observers were required to reproduce, after a short delay, a distance between two sample dots based on a stationary reference dot and a movable mouse pointer. When both sample dots are foveated, we find that the distance estimation error is small but consistently increases with the dots-separation size. In comparison, distance judgment in peripheral encoding condition is significantly overestimated for smaller separations and becomes similar to the performance in foveal trials for distances from 10 to 16 degrees.<h4>Conclusions/significance</h4>Although we find improved accuracy of distance estimation in the foveal condition, the fact that the difference is related to the reduction of the estimation bias present in the peripheral condition, challenges the simple account of reducing the eccentricity-dependent positional uncertainty. Contrary to this, we present evidence for an explanation in terms of neuronal populations activated by the two sample dots and their inhibitory interactions under different visual encoding conditions. We support our claims with simulations that take into account receptive fields size differences between the two encoding conditions.Anna OleksiakMirosława MańkoAlbert PostmaIneke J M van der HamAlbert V van den BergRichard J A van WezelPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 3, p e9918 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anna Oleksiak Mirosława Mańko Albert Postma Ineke J M van der Ham Albert V van den Berg Richard J A van Wezel Distance estimation is influenced by encoding conditions.
description	<h4>Background</h4>It is well established that foveating a behaviorally relevant part of the visual field improves localization performance as compared to the situation where the gaze is directed elsewhere. Reduced localization performance in the peripheral encoding conditions has been attributed to an eccentricity-dependent increase in positional uncertainty. It is not known, however, whether and how the foveal and peripheral encoding conditions can influence spatial interval estimation. In this study we compare observers' estimates of a distance between two co-planar dots in the condition where they foveate the two sample dots and where they fixate a central dot while viewing the sample dots peripherally.<h4>Methodology/principal findings</h4>Observers were required to reproduce, after a short delay, a distance between two sample dots based on a stationary reference dot and a movable mouse pointer. When both sample dots are foveated, we find that the distance estimation error is small but consistently increases with the dots-separation size. In comparison, distance judgment in peripheral encoding condition is significantly overestimated for smaller separations and becomes similar to the performance in foveal trials for distances from 10 to 16 degrees.<h4>Conclusions/significance</h4>Although we find improved accuracy of distance estimation in the foveal condition, the fact that the difference is related to the reduction of the estimation bias present in the peripheral condition, challenges the simple account of reducing the eccentricity-dependent positional uncertainty. Contrary to this, we present evidence for an explanation in terms of neuronal populations activated by the two sample dots and their inhibitory interactions under different visual encoding conditions. We support our claims with simulations that take into account receptive fields size differences between the two encoding conditions.
format	article
author	Anna Oleksiak Mirosława Mańko Albert Postma Ineke J M van der Ham Albert V van den Berg Richard J A van Wezel
author_facet	Anna Oleksiak Mirosława Mańko Albert Postma Ineke J M van der Ham Albert V van den Berg Richard J A van Wezel
author_sort	Anna Oleksiak
title	Distance estimation is influenced by encoding conditions.
title_short	Distance estimation is influenced by encoding conditions.
title_full	Distance estimation is influenced by encoding conditions.
title_fullStr	Distance estimation is influenced by encoding conditions.
title_full_unstemmed	Distance estimation is influenced by encoding conditions.
title_sort	distance estimation is influenced by encoding conditions.
publisher	Public Library of Science (PLoS)
publishDate	2010
url	https://doaj.org/article/4cc9b2f91cd548f89a6eef5050be4d82
work_keys_str_mv	AT annaoleksiak distanceestimationisinfluencedbyencodingconditions AT mirosławamanko distanceestimationisinfluencedbyencodingconditions AT albertpostma distanceestimationisinfluencedbyencodingconditions AT inekejmvanderham distanceestimationisinfluencedbyencodingconditions AT albertvvandenberg distanceestimationisinfluencedbyencodingconditions AT richardjavanwezel distanceestimationisinfluencedbyencodingconditions
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Distance estimation is influenced by encoding conditions.

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