Perceptual load interacts with involuntary attention at early processing stages: Event-related potential studies

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	Perceptual load interacts with involuntary attention at early processing stages: Event-related potential studies
	Fu, Shimin 1; Huang, Yuxia 2; Luo, Yuejia2 ; Wang, Yan3 ; Fedota, John 1; Greenwood, Pamela M.1; Parasuraman, Raja 1; S. M. Fu
摘要	Perceptual load is known to influence the locus of attentional selection in the brain but through an unknown underlying mechanism. We used event-related potentials (ERPs) to investigate how perceptual load interacts with cue-driven involuntary attention. Perceptual load was manipulated in a line orientation discrimination task in which target location was cued involuntarily by means of peripheral cues. Attentional modulation was observed for P1m (the posterior midline P1 component with peak latency between 108 and 140 ms) with invalid trials eliciting larger P1m than valid trials. This attentional effect on P1m increased as a function of perceptual load, suggesting an early temporal locus for the interaction of perceptual load and involuntary attention. Attentional modulation for the C1 component (peak latency at approximately 80 ms) was also observed, but only for high-load stimuli that were presented intermixed with low-load stimuli. Results suggest that (a) perceptual load affects attentional selection at early processing stages; (b) perceptual load interacts with involuntary attention earlier and with different brain mechanisms relative to voluntary attention: and (c) attentional modulation in the C1 time range is possible under optimal experimental conditions.; Perceptual load is known to influence the locus of attentional selection in the brain but through an unknown underlying mechanism. We used event-related potentials (ERPs) to investigate how perceptual load interacts with cue-driven involuntary attention. Perceptual load was manipulated in a line orientation discrimination task in which target location was cued involuntarily by means of peripheral cues. Attentional modulation was observed for P1m (the posterior midline P1 component with peak latency between 108 and 140 ms) with invalid trials eliciting larger P1m than valid trials. This attentional effect on P1m increased as a function of perceptual load, suggesting an early temporal locus for the interaction of perceptual load and involuntary attention. Attentional modulation for the C1 component (peak latency at approximately 80 ms) was also observed, but only for high-load stimuli that were presented intermixed with low-load stimuli. Results suggest that (a) perceptual load affects attentional selection at early processing stages; (b) perceptual load interacts with involuntary attention earlier and with different brain mechanisms relative to voluntary attention: and (c) attentional modulation in the C1 time range is possible under optimal experimental conditions. (C) 2009 Elsevier Inc. All rights reserved.
关键词	Perceptual load Involuntary attention Event-related potentials (ERPs) Peripheral cueing C1 P1m
学科领域	认知心理学
	2009-10-15
语种	英语
发表期刊	NEUROIMAGE
ISSN	1053-8119
卷号	48 期号:1 页码:191-199
期刊论文类型	Article
收录类别	SCI ; SSCI
WOS记录号	WOS:000269321100022
引用统计	被引频次：51[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.psych.ac.cn/handle/311026/5617
专题	中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	S. M. Fu
作者单位	1.George Mason Univ, ARCH Lab, Dept Psychol, Fairfax, VA 22030 USA 2.Beijing Normal Univ, Natl Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Key Lab Mental Hlth, Inst Psychol, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Fu, Shimin,Huang, Yuxia,Luo, Yuejia,et al. Perceptual load interacts with involuntary attention at early processing stages: Event-related potential studies[J]. NEUROIMAGE,2009,48(1):191-199.
APA	Fu, Shimin.,Huang, Yuxia.,Luo, Yuejia.,Wang, Yan.,Fedota, John.,...&S. M. Fu.(2009).Perceptual load interacts with involuntary attention at early processing stages: Event-related potential studies.NEUROIMAGE,48(1),191-199.
MLA	Fu, Shimin,et al."Perceptual load interacts with involuntary attention at early processing stages: Event-related potential studies".NEUROIMAGE 48.1(2009):191-199.

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