Stimulus saliency modulates pre-attentive processing speed in human visual cortex.

The notion of a saliency-based processing architecture [1] underlying human vision is central to a number of current theories of visual selective attention [e.g., 2]. On this view, focal-attention is guided by an overall-saliency map of the scene, which integrates (sums) signals from pre-attentive s...

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Autores principales:	Thomas Töllner, Michael Zehetleitner, Klaus Gramann, Hermann J Müller
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e73c297de91d4c5fbe0799f2eab24a07
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id	oai:doaj.org-article:e73c297de91d4c5fbe0799f2eab24a07
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spelling	oai:doaj.org-article:e73c297de91d4c5fbe0799f2eab24a072021-11-18T07:00:06ZStimulus saliency modulates pre-attentive processing speed in human visual cortex.1932-620310.1371/journal.pone.0016276https://doaj.org/article/e73c297de91d4c5fbe0799f2eab24a072011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21283699/?tool=EBIhttps://doaj.org/toc/1932-6203The notion of a saliency-based processing architecture [1] underlying human vision is central to a number of current theories of visual selective attention [e.g., 2]. On this view, focal-attention is guided by an overall-saliency map of the scene, which integrates (sums) signals from pre-attentive sensory feature-contrast computations (e.g., for color, motion, etc.). By linking the Posterior Contralateral Negativity (PCN) component to reaction time (RT) performance, we tested one specific prediction of such salience summation models: expedited shifts of focal-attention to targets with low, as compared to high, target-distracter similarity. For two feature-dimensions (color and orientation), we observed decreasing RTs with increasing target saliency. Importantly, this pattern was systematically mirrored by the timing, as well as amplitude, of the PCN. This pattern demonstrates that visual saliency is a key determinant of the time it takes for focal-attention to be engaged onto the target item, even when it is just a feature singleton.Thomas TöllnerMichael ZehetleitnerKlaus GramannHermann J MüllerPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 1, p e16276 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Thomas Töllner Michael Zehetleitner Klaus Gramann Hermann J Müller Stimulus saliency modulates pre-attentive processing speed in human visual cortex.
description	The notion of a saliency-based processing architecture [1] underlying human vision is central to a number of current theories of visual selective attention [e.g., 2]. On this view, focal-attention is guided by an overall-saliency map of the scene, which integrates (sums) signals from pre-attentive sensory feature-contrast computations (e.g., for color, motion, etc.). By linking the Posterior Contralateral Negativity (PCN) component to reaction time (RT) performance, we tested one specific prediction of such salience summation models: expedited shifts of focal-attention to targets with low, as compared to high, target-distracter similarity. For two feature-dimensions (color and orientation), we observed decreasing RTs with increasing target saliency. Importantly, this pattern was systematically mirrored by the timing, as well as amplitude, of the PCN. This pattern demonstrates that visual saliency is a key determinant of the time it takes for focal-attention to be engaged onto the target item, even when it is just a feature singleton.
format	article
author	Thomas Töllner Michael Zehetleitner Klaus Gramann Hermann J Müller
author_facet	Thomas Töllner Michael Zehetleitner Klaus Gramann Hermann J Müller
author_sort	Thomas Töllner
title	Stimulus saliency modulates pre-attentive processing speed in human visual cortex.
title_short	Stimulus saliency modulates pre-attentive processing speed in human visual cortex.
title_full	Stimulus saliency modulates pre-attentive processing speed in human visual cortex.
title_fullStr	Stimulus saliency modulates pre-attentive processing speed in human visual cortex.
title_full_unstemmed	Stimulus saliency modulates pre-attentive processing speed in human visual cortex.
title_sort	stimulus saliency modulates pre-attentive processing speed in human visual cortex.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/e73c297de91d4c5fbe0799f2eab24a07
work_keys_str_mv	AT thomastollner stimulussaliencymodulatespreattentiveprocessingspeedinhumanvisualcortex AT michaelzehetleitner stimulussaliencymodulatespreattentiveprocessingspeedinhumanvisualcortex AT klausgramann stimulussaliencymodulatespreattentiveprocessingspeedinhumanvisualcortex AT hermannjmuller stimulussaliencymodulatespreattentiveprocessingspeedinhumanvisualcortex
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Stimulus saliency modulates pre-attentive processing speed in human visual cortex.

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