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Perceptual load, voluntary attention, and aging: An event-related potential study
Wang, Yan2; Fu, Shimin3; Greenwood, Pamela1; Luo, Yuejia4; Parasuraman, Raja1; Parasuraman, R (reprint author), George Mason Univ, Dept Psychol 3F5, 4400 Univ Dr, Fairfax, VA 22030 USA.
2012-04-01
发表期刊INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY
ISSN0167-8760
文章类型Article
卷号84期号:1页码:17-25
产权排序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
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收录类别SSCI
语种英语
项目资助者NIA [AG19653] ; SRF for ROCS, SEM [20111021085] ; Tsinghua University, China [20111081107] ; NSFC [Y2JJ081004] ; Institute of Psychology, Chinese Academy of Sciences [Y0CX091S01]
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
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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
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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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