特征选择性注意力在空间注意力的焦点内外的时间过程
Søren K Andersen1,2, Steven A Hillyard3,4
1Department of Psychology, University of Southern Denmark, Odense M DK-5230, Denmark.
概括
注意的特征选择在整个视野中并不立即发生. 基于特征的注意力最初集中在被关注的位置,然后随着时间的推移扩展到不受关注的区域.
科学领域:
- 认知神经科学 认知神经科学
- 视觉注意力研究 视觉注意力研究
背景情况:
- 关于对刺激特征的注意力选择的空间范围,存在相互矛盾的发现.
- 一些研究表明全球便利化,而另一些研究则报告了特定位置的增强.
研究的目的:
- 研究基于特征的注意力在空间注意力的焦点内外的时间动态.
- 解决以前关于注意力选择机制的研究中的矛盾.
主要方法:
- 参与者执行了一项视觉任务,需要注意特定位置的特定特征 (颜色).
- 稳定状态视觉唤起潜能 (ssVEPs) 被记录下来,以测量视觉皮层的神经活动.
- 关注调制的时间被比较到与无人监督的视野之间.
主要成果:
- 特征选择性注意力调节神经活动在被照顾的侧面大约比无人照顾的侧面早150毫秒.
- 这种时间延迟表明,从一开始对特征的关注并没有得到全球的关注.
结论:
- 基于特征的注意力表现出一个层次的时间进展,最初专注于被照顾的位置,然后扩展到无人照顾的区域.
- 这种时间延迟使全球和特定位置的注意力选择发现之间的先前差异得到协调.
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