On the time course of bottom-up and top-down processes in selective visual attention: an EEG study.

On the time course of bottom-up and top-down processes in selective visual attention: an EEG study.
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关于选择性视觉注意中自下而上和自上而下过程的时间进程:脑电图研究。

DOI:
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
E. Wascher
E. Wascher
中科院分区:
心理学3区
文献类型:
--
作者:
Daniel Schneider;C. Beste;E. Wascher

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根据最近的视觉注意模型,信号的显著性(自下而上)和搜索特定刺激的意图(自上而下)都是注意选择的决定因素。我们研究了这些机制,通过改变自上而下的一组参与者,必须检测两个对称位置的酒吧的亮度或方向的变化。不相关的变化损害目标检测时,他们提出了空间分离的相关变化。最初的注意力选择表示在后N1不对称性,并确定了方向变化的相对显着性和随后的故意偏向相关的刺激。只有当显着的方向变化干扰亮度目标选择在N1时间窗口没有N2pc发生。因此,相关信息的选择在网络中进行,其激活是由自下而上和自上而下过程的动态相互作用引起的。
According to recent models on visual attention, both the salience of signals (bottom-up) and the intention to search for particular stimuli (top-down) are determinants for attentional selection. We investigated these mechanisms by varying the top-down set of participants that had to detect either luminance or orientation changes of two symmetrically located bars. Irrelevant changes impaired target detection when they were presented spatially separated to the relevant change. Initial attentional selection was represented in posterior N1 asymmetries and was determined by both the relative salience of orientation changes and a subsequent intentional bias towards relevant stimuli. Only when salient orientation changes interfered with luminance target selection in the N1 time window did an N2pc occur. Thus, the selection of relevant information proceeds in a network whose activation is induced by a dynamic interplay of bottom-up and top-down processes.
视觉单例的注意力捕获是由自上而下的任务集介导的:来自 N2pc 组件的新证据。
DOI: 10.1111/j.1469-8986.2008.00700.x
发表时间: 2008-11
期刊: PSYCHOPHYSIOLOGY
影响因子: 3.7
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DOI: 10.1111/j.1469-8986.1994.tb02218.x
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