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Dimension-based attention modulates early visual processing.

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Title: Dimension-based attention modulates early visual processing.
Authors: Gramann, Klaus (AUTHOR), Töllner, Thomas (AUTHOR), Müller, Hermann J. (AUTHOR)
Source: Psychophysiology. Sep2010, Vol. 47 Issue 5, p968-978. 11p. 1 Color Photograph, 1 Diagram, 1 Chart, 3 Graphs.
Subjects: Attention, Dimensional preference, Visual perception, Reaction time, Stimulus synthesis, Neurosciences
Abstract: Target selection can be based on spatial or dimensional/featural mechanisms operating in a location-independent manner. We investigated whether dimension-based attention affects processing in early visual stages. Subjects searched for a singleton target among an 8-item array, with the search display preceded by an identical cue array with a dimensionally non-predictive, but spatially predictive singleton. Reaction times (RTs) were increased for changes in the target-defining dimension but not for featural changes within a dimension. This RT effect was mirrored by modulations of the P1 and anterior transition N2 (tN2). Current density reconstructions revealed increased activity in dorsal occipital cortex and decreased activity in left frontopolar cortex owing to repeated dimensional pop-out identities. These findings strengthen dimension-based theories of visual attention by indicating dimension-, rather than feature-, specific influences within the first 110 ms of visual processing. [ABSTRACT FROM AUTHOR]
Copyright of Psychophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Dimension-based attention modulates early visual processing.
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  Data: <searchLink fieldCode="AR" term="%22Gramann%2C+Klaus%22">Gramann, Klaus</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Töllner%2C+Thomas%22">Töllner, Thomas</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Müller%2C+Hermann+J%2E%22">Müller, Hermann J.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Psychophysiology%22">Psychophysiology</searchLink>. Sep2010, Vol. 47 Issue 5, p968-978. 11p. 1 Color Photograph, 1 Diagram, 1 Chart, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Attention%22">Attention</searchLink><br /><searchLink fieldCode="DE" term="%22Dimensional+preference%22">Dimensional preference</searchLink><br /><searchLink fieldCode="DE" term="%22Visual+perception%22">Visual perception</searchLink><br /><searchLink fieldCode="DE" term="%22Reaction+time%22">Reaction time</searchLink><br /><searchLink fieldCode="DE" term="%22Stimulus+synthesis%22">Stimulus synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Neurosciences%22">Neurosciences</searchLink>
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  Label: Abstract
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  Data: Target selection can be based on spatial or dimensional/featural mechanisms operating in a location-independent manner. We investigated whether dimension-based attention affects processing in early visual stages. Subjects searched for a singleton target among an 8-item array, with the search display preceded by an identical cue array with a dimensionally non-predictive, but spatially predictive singleton. Reaction times (RTs) were increased for changes in the target-defining dimension but not for featural changes within a dimension. This RT effect was mirrored by modulations of the P1 and anterior transition N2 (tN2). Current density reconstructions revealed increased activity in dorsal occipital cortex and decreased activity in left frontopolar cortex owing to repeated dimensional pop-out identities. These findings strengthen dimension-based theories of visual attention by indicating dimension-, rather than feature-, specific influences within the first 110 ms of visual processing. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Psychophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/j.1469-8986.2010.00998.x
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Dimensional preference
        Type: general
      – SubjectFull: Visual perception
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      – SubjectFull: Reaction time
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      – SubjectFull: Stimulus synthesis
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              Text: Sep2010
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