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

	Perceptual load, voluntary attention, and aging: An event-related potential study
	Wang, Yan2 ; Fu, Shimin 3; Greenwood, Pamela 1; Luo, Yuejia4 ; Parasuraman, Raja 1; Parasuraman, R (reprint author), George Mason Univ, Dept Psychol 3F5, 4400 Univ Dr, Fairfax, VA 22030 USA.
心理所单位排序	1
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.
关键词	Event-related potentials Aging Perceptual load Voluntary attention
学科领域	Cognitive Psychology
	2012-04-01
语种	英语
发表期刊	INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY
ISSN	0167-8760
卷号	84 期号:1 页码:17-25
期刊论文类型	Article
URL	查看原文
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.
WOS记录号	WOS:000303847200002
资助机构	NIA [AG19653] ; SRF for ROCS, SEM [20111021085] ; Tsinghua University, China [20111081107] ; NSFC [Y2JJ081004] ; Institute of Psychology, Chinese Academy of Sciences [Y0CX091S01]
引用统计	被引频次：16[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/311026/12891
专题	中国科学院心理健康重点实验室
通讯作者	Parasuraman, R (reprint author), George Mason Univ, Dept Psychol 3F5, 4400 Univ Dr, Fairfax, VA 22030 USA.
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
第一作者单位	中国科学院心理健康重点实验室
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,&Parasuraman, R .(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.

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