Comparing the time course and efficacy of spatial and feature-based attention
Comparing the time course and efficacy of spatial and feature-based attention
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DOI：
10.1016/j.visres.2006.09.017
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发表时间：
2007-01-01
期刊：
影响因子：
1.8
通讯作者：
Carrasco, Marisa
中科院分区：
文献类型：
--
作者：
Liu, Taosheng;Stevens, Sean T.;Carrasco, Marisa
在相同刺激和任务的实验中，我们研究了基于特征的注意的时间过程，并将其与空间注意的时间过程进行了比较。观察员检测到的复合运动刺激之前的线索，表明目标位置或方向的速度增量。改变线索-靶刺激起始时间（SOA）以评估注意效应的时间过程。我们发现，空间注意力的部署早于基于特征的注意力，这两种类型的注意力提高性能在一个较长的SOA相似的程度。结果表明，注意力是一种灵活的机制，使我们能够有效地选择任务相关的信息的基础上，无论是空间或功能的尺寸，但空间注意发挥其作用更快。(c)2006爱思唯尔有限公司保留所有权利。
We investigated the time course of feature-based attention and compared it to the time course of spatial attention in an experiment with identical stimuli and task. Observers detected a speed increment in a compound motion stimulus preceded by cues that indicated either the target location or direction. The cue-target stimulus-onset-asynchrony (SOA) was varied to assess the time course of the attentional effect. We found that spatial attention was deployed earlier than feature-based attention and that both types of attention improved performance to a similar extent at a longer SOA. Results indicate that attention is a flexible mechanism allowing us to efficiently select task-relevant information based on either spatial or feature dimensions, but that spatial attention exert its effects faster. (c) 2006 Elsevier Ltd. All rights reserved.