Salience-based progression of visual attention

[EN]Cognitive and computational models assume that visual attention is directed to the most salient stim ulus in a given scene, and physiological models suggest the attribution of salience might depend on the extrageniculate pathway, involving the superior colliculus and pulvinar. Empirical findings...

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Detalles Bibliográficos
Autores: Michael, George A., Gálvez García, Germán
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Institución:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/157675
Acceso en línea:http://hdl.handle.net/10366/157675
Access Level:acceso abierto
Palabra clave:Visual attention
Salience
Extrageniculate
Nasal–temporal asymmetry
61 Psicología
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spelling Salience-based progression of visual attentionMichael, George A.Gálvez García, GermánVisual attentionSalienceExtrageniculateNasal–temporal asymmetry61 Psicología[EN]Cognitive and computational models assume that visual attention is directed to the most salient stim ulus in a given scene, and physiological models suggest the attribution of salience might depend on the extrageniculate pathway, involving the superior colliculus and pulvinar. Empirical findings support these models. Another assumption is that attention progresses from the most to the least salient item until a target is found. We have therefore attempted to investigate whether behavioral nasal–temporal hemifield asymmetries in healthy humans are present in the salience-based progression of attention. Hemispheric asymmetries have also been investigated. Healthy volunteers were presented with brief lateralized displays containing three stimuli of unequal sizes (one target and two distractors) and asked to make a judgment regarding the target. In each new trial, each ofthe three stimuli was chosen randomly with equal probability of being the target. The expected salience-based progression was found in both response times and accuracy. While no temporal-nasal asymmetries were found in accuracy for displays processed by the left hemisphere, a well-marked asymmetry was found for displays processed by the right hemisphere. The progression slope was quite steep for nasal displays and nil for temporal displays. A companion experiment replicated the results, another one ruled out any sensory interpretation of the results, and a last one ruled out the possibility that the results were due to saccadic eye movements. What distinguishes the two pathways is therefore not whether or not they generate salience, but the strength of the activity that differentiates the visual input. Furthermore, the involvement of the right extrageniculate pathway in the fineness of the perceptual analysis that follows orienting of attention seems to take place independently of the salience of the attended item.Elsevier202420242011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10366/157675reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1576752026-06-07T06:28:51Z
dc.title.none.fl_str_mv Salience-based progression of visual attention
title Salience-based progression of visual attention
spellingShingle Salience-based progression of visual attention
Michael, George A.
Visual attention
Salience
Extrageniculate
Nasal–temporal asymmetry
61 Psicología
title_short Salience-based progression of visual attention
title_full Salience-based progression of visual attention
title_fullStr Salience-based progression of visual attention
title_full_unstemmed Salience-based progression of visual attention
title_sort Salience-based progression of visual attention
dc.creator.none.fl_str_mv Michael, George A.
Gálvez García, Germán
author Michael, George A.
author_facet Michael, George A.
Gálvez García, Germán
author_role author
author2 Gálvez García, Germán
author2_role author
dc.subject.none.fl_str_mv Visual attention
Salience
Extrageniculate
Nasal–temporal asymmetry
61 Psicología
topic Visual attention
Salience
Extrageniculate
Nasal–temporal asymmetry
61 Psicología
description [EN]Cognitive and computational models assume that visual attention is directed to the most salient stim ulus in a given scene, and physiological models suggest the attribution of salience might depend on the extrageniculate pathway, involving the superior colliculus and pulvinar. Empirical findings support these models. Another assumption is that attention progresses from the most to the least salient item until a target is found. We have therefore attempted to investigate whether behavioral nasal–temporal hemifield asymmetries in healthy humans are present in the salience-based progression of attention. Hemispheric asymmetries have also been investigated. Healthy volunteers were presented with brief lateralized displays containing three stimuli of unequal sizes (one target and two distractors) and asked to make a judgment regarding the target. In each new trial, each ofthe three stimuli was chosen randomly with equal probability of being the target. The expected salience-based progression was found in both response times and accuracy. While no temporal-nasal asymmetries were found in accuracy for displays processed by the left hemisphere, a well-marked asymmetry was found for displays processed by the right hemisphere. The progression slope was quite steep for nasal displays and nil for temporal displays. A companion experiment replicated the results, another one ruled out any sensory interpretation of the results, and a last one ruled out the possibility that the results were due to saccadic eye movements. What distinguishes the two pathways is therefore not whether or not they generate salience, but the strength of the activity that differentiates the visual input. Furthermore, the involvement of the right extrageniculate pathway in the fineness of the perceptual analysis that follows orienting of attention seems to take place independently of the salience of the attended item.
publishDate 2011
dc.date.none.fl_str_mv 2011
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/157675
url http://hdl.handle.net/10366/157675
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
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