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Vision Res. 2005 Mar;45(7):839-44. Epub 2004 Dec 19.

Subliminal attentional modulation in crowding condition.

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School of Cognitive Sciences (SCS), Institute for Studies in Theoretical Physics and Mathematics (IPM), Niavaran, P.O. Box 19395-5746, Tehran, Iran.


In the crowding phenomenon, recognition of a visual target is impaired by other similar visual stimuli (distracters) presented near the target. This effect may be due largely to insufficient resolution of spatial attention. We showed that attention could subliminally enhance orientation selective adaptation to illusory lines in the crowding condition where target-distractor separation is beyond the limit of spatial resolution of attention. Despite the traditionally held close link between attention and awareness, here we provided evidence for subliminal attentional modulation for orientation stimuli that could not have been consciously perceived.

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