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Spatial attention speeds discrimination without awareness in blindsight.

Kentridge, R. W. and Heywood, C. A. and Weiskrantz, L. (2004) 'Spatial attention speeds discrimination without awareness in blindsight.', Neuropsychologia., 42 (6). pp. 831-835.

Abstract

An intimate relationship is often assumed between visual attention and visual awareness. Using a subject, patient GY, with the neurological condition of ‘blindsight’ we show that although attention may be a necessary precursor to visual awareness it is not a sufficient one. Using a Posner endogenous spatial cueing paradigm we showed that the time our subject needed to discriminate the orientation of a stimulus was reduced if he was cued to the location of the stimulus. This reaction-time advantage was obtained without any decrease in discrimination accuracy and cannot therefore be attributed to speed-error trade-off or differences in bias between cued and uncued locations. As a result of his condition GY was not aware of the stimuli to which processing was attentionally facilitated. Attention cannot, therefore be a sufficient condition for awareness.

Item Type:Article
Keywords:Vision, Attention, Consciousness, Blindsight.
Full text:Full text not available from this repository.
Publisher Web site:http:/dx.doi.org/10.1016/j.neuropsychologia.2003.11.001
Record Created:30 Mar 2007
Last Modified:05 Apr 2010 16:53

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