Perceptual load, voluntary attention, and aging: An event-related potential study

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	Perceptual load, voluntary attention, and aging: An event-related potential study
	Wang, Yan2 ; Fu, Shimin 3; Greenwood, Pamela 1; Luo, Yuejia4 ; Parasuraman, Raja 1
刊名	INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY
	2012-04-01
卷号	84 期号:1 页码:17-25
关键词	Event-related potentials Aging Perceptual load Voluntary attention
ISSN号	0167-8760
通讯作者	Parasuraman, R (reprint author), George Mason Univ, Dept Psychol 3F5, 4400 Univ Dr, Fairfax, VA 22030 USA.
产权排序	1
英文摘要	The locus of attentional selection is known to vary with perceptual load (Lavie et al., 2004). Under voluntary attention, perceptual load modulates selective visual processing at an early cortical stage, as reflected in the posterior P1 and N1 components of the event-related potentials (ERPs). Adult aging also affects both behavioral and ERP signs of attentional selection. However, it is not known whether perceptual load modulates this relationship. Accordingly, in the present study ERPs were recorded in a voluntary attention task. Young and old participants were asked to discriminate the direction of a target line embedded within a display of four lines that appeared in the left or right visual field. Participants responded faster and more accurately to valid relative to invalid trials and to low-load relative to high-load condition. Older participants responded more slowly and with lower accuracy than young participants in all conditions. The amplitudes of the posterior contralateral P1 and N1 components in valid trials were larger than that in invalid trials in all conditions. N1 amplitude was larger under the high load condition than that in the low load condition. Moreover, in the high perceptual load condition, the old group had a larger N1 than the young group at contralateral sites. The findings suggest that under voluntary attention, perceptual load and aging modulates attentional selection at an early but not the earliest stage, during the N1 (120-200 ms) time range. Increased N1 amplitude in older adults may reflect increased demands on target discrimination in high perceptual load. (C) 2012 Elsevier B.V. All rights reserved.
学科主题	Cognitive psychology
收录类别	SSCI
项目简介	This research was supported by NIA grant AG19653 to R.P., SRF for ROCS, SEM (20111021085) and Initiative Scientific Research Program, Tsinghua University, China (20111081107) to S. F., NSFC (Y2JJ081004) and Project for Young Scientists Fund, Institute of Psychology, Chinese Academy of Sciences (Y0CX091S01) to Y.W.
原文出处	http://ac.els-cdn.com/S0167876012000049/1-s2.0-S0167876012000049-main.pdf?_tid=d1e87542-cba9-11e4-a871-00000aacb360&acdnat=1426489276_7a335e2506a84f3cc2ce6cac7ab92021
语种	英语
WOS记录号	WOS:000303847200002
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/12891]
专题	心理研究所_中国科学院心理健康重点实验室
作者单位	1.George Mason Univ, Dept Psychol, ARCH Lab, Fairfax, VA 22030 USA 2.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China 3.Tsinghua Univ, Dept Psychol, Beijing 100084, Peoples R China 4.Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yan,Fu, Shimin,Greenwood, Pamela,et al. Perceptual load, voluntary attention, and aging: An event-related potential study[J]. INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY,2012,84(1):17-25.
APA	Wang, Yan,Fu, Shimin,Greenwood, Pamela,Luo, Yuejia,&Parasuraman, Raja.(2012).Perceptual load, voluntary attention, and aging: An event-related potential study.INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY,84(1),17-25.
MLA	Wang, Yan,et al."Perceptual load, voluntary attention, and aging: An event-related potential study".INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY 84.1(2012):17-25.