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A Dissociation of Attention and Awareness in Phase-sensitive but Not Phase-insensitive Visual Channels

Brascamp, Jan W. and van Boxtel, Jeroen J. A. and Knapen, Tomas H. J. and Blake, Randolph (2010) A Dissociation of Attention and Awareness in Phase-sensitive but Not Phase-insensitive Visual Channels. Journal of Cognitive Neuroscience, 22 (10). pp. 2326-2344. ISSN 0898-929X. http://resolver.caltech.edu/CaltechAUTHORS:20100713-110259033

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Abstract

The elements most vivid in our conscious awareness are the ones to which we direct our attention. Scientific study confirms the impression of a close bond between selective attention and visual awareness, yet the nature of this association remains elusive. Using visual afterimages as an index, we investigate neural processing of stimuli as they enter awareness and as they become the object of attention. We find evidence of response enhancement accompanying both attention and awareness, both in the phase-sensitive neural channels characteristic of early processing stages and in the phase-insensitive channels typical of higher cortical areas. The effects of attention and awareness on phase-insensitive responses are positively correlated, but in the same experiments, we observe no correlation between the effects on phase-sensitive responses. This indicates independent signatures of attention and awareness in early visual areas yet a convergence of their effects at more advanced processing stages.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1162/jocn.2009.21397DOIArticle
http://www.mitpressjournals.org/doi/abs/10.1162/jocn.2009.21397PublisherArticle
Additional Information:© 2009 Massachusetts Institute of Technology. Posted Online June 11, 2010. This work was supported by Rubicon grants from the Netherlands Organisation for Scientific Research ( J. B. and J. v. B.) and NIH EY13358 (R. B.).
Group:Koch Laboratory, KLAB
Funders:
Funding AgencyGrant Number
Netherlands Organisation for Scientific Research UNSPECIFIED
NIHEY13358
Record Number:CaltechAUTHORS:20100713-110259033
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20100713-110259033
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19027
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 Aug 2010 17:29
Last Modified:18 Sep 2013 21:19

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