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.
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.
|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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