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Publication Detail
Spatial attention can modulate unconscious orientation processing.
Abstract
It has recently been suggested that visual spatial attention can only affect consciously perceived events. We measured the effects of sustained spatial attention on orientation-selective adaptation to gratings, rendered invisible by prolonged interocular suppression. Spatial attention augmented the orientation-selective adaptation to invisible adaptor orientation and the effect of attention was clearest at peri-threshold, intermediate contrast levels suggesting that previous negative results were due to assessing orientation discrimination at maximum contrast. Based on our findings, we propose a constrained hypothesis for the difference between neuronal mechanisms of spatial attention in the presence versus absence of awareness.
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Institute of Cognitive Neuroscience
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Faculty of Life Sciences
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Institute of Cognitive Neuroscience
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