Spatial attention can modulate unconscious orientation processing
Spatial attention can modulate unconscious orientation processing
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DOI：
10.1068/p5999
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发表时间：
2008-01-01
期刊：
影响因子：
1.7
通讯作者：
Lavie, Nilli
中科院分区：
文献类型：
--
作者：
Bahrami, Bahador;Carmel, David;Lavie, Nilli
最近有人提出，视觉空间注意只能影响有意识的感知事件。我们测量了持续的空间注意对格栅的定向选择性适应的影响，这种格栅因长期的眼间抑制而变得不可见。空间注意增强了对隐形适配器定向的定向选择性适应。在阈值附近、中等对比度水平的测试刺激下，注意力的影响最为明显，这表明先前的负面结果是由于在最大对比度下评估方位辨别。在这些发现的基础上，我们提出了一个受限的假说，解释了意识存在和不存在的空间注意神经元机制之间的差异。
It has recently been suggested that visual spatial attention can only affect consciously perceived events. We measured the effects of sustained spatial attention oil orientation-selective adaptation to gratings, rendered invisible by prolonged interocular suppression. Spatial attention augmented the orientation-selective adaptation to invisible adaptor orientation. The effect of attention was clearest for test stimuli at peri-threshold, intermediate contrast levels, suggesting that previous negative results were due to assessing orientation discrimination at maximum contrast. Oil the basis of these findings we propose a constrained hypothesis for the difference between neuronal mechanisms of spatial attention in the presence versus absence of awareness.