Types of attention matter for awareness: A study with color afterimages
Types of attention matter for awareness: A study with color afterimages
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DOI：
10.1016/j.concog.2009.09.002
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发表时间：
2009-12-01
影响因子：
2.4
通讯作者：
Srinivasan, Narayanan
中科院分区：
文献类型：
--
作者：
Baijal, Shruti;Srinivasan, Narayanan
有人认为，注意力和意识可能会相互对立，因为关注适应刺激会削弱其后像。相反，我们认为，由空间范围和感知水平引导的注意力类型至关重要，并且可能会导致使用残像的意识差异。参与者在三个实验中用小、大、局部或全局字母和蓝色方块作为适应刺激来执行中心任务，并指示残像的开始和偏移。我们发现注意力空间扩散的增加导致残像持续时间的减少。就处理水平而言，全局处理在空间范围控制刺激的情况下产生了更长的残像持续时间。结果表明，集中或分散的注意力对意识产生不同的影响，可能是通过它们与参与颜色残像形成的极性依赖和独立过程的不同相互作用来实现的。 (C) 2009 Elsevier Inc. 保留所有权利。
It has been argued that attention and awareness might oppose each other given that attending to an adapting stimulus weakens its afterimage. We argue instead that the type of attention guided by spatial extent and perceptual levels is critical and might result in differences in awareness using afterimages. Participants performed a central task with small, large, local, or global letters and a blue square as an adapting stimulus in three experiments and indicated the onset and offset of the afterimage. We found that increases in the spatial spread of attention resulted in the decrease of afterimage duration. In terms of levels of processing, global processing produced larger afterimage durations with stimuli controlled for spatial extent. The results suggest that focused or distributed attention produce different effects on awareness, possibly through their differential interactions with polarity dependent and independent processes involved in the formation of color afterimages. (C) 2009 Elsevier Inc. All rights reserved.