Lee, D. K. and Itti, Laurent and Koch, Christof and Braun, Jochen (1999) Attention activates winner-take-all competition among visual filters. Nature Neuroscience, 2 (4). pp. 375-381. ISSN 1097-6256. http://resolver.caltech.edu/CaltechAUTHORS:20130816-103213173
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Shifting attention away from a visual stimulus reduces, but does not abolish, visual discrimination performance. This residual vision with 'poor' attention can be compared to normal vision with 'full' attention to reveal how attention alters visual perception. We report large differences between residual and normal visual thresholds for discriminating the orientation or spatial frequency of simple patterns, and smaller differences for discriminating contrast. A computational model, in which attention activates a winner-take-all competition among overlapping visual filters, quantitatively accounts for all observations. Our model predicts that the effects of attention on visual cortical neurons include increased contrast gain as well as sharper tuning to orientation and spatial frequency.
|Additional Information:||RECEIVED 24 NOVEMBER 1998; ACCEPTED 24 FEBRUARY 1999. Supported by NSF, NIMH, ONR and the NSF-ERC at Caltech. We thank T. Albright and T. Sejnowski for access to facilities and J. Gallant, A. Manwani, S. Shimojo, K. Watanabe and B. Zenger for comments and discussions.|
|Group:||Koch Laboratory, KLAB|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||KLAB Import|
|Deposited On:||11 Jan 2008 02:43|
|Last Modified:||25 Mar 2015 23:04|
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