Age differences in task switching and response monitoring: Evidence from ERPs

被引：84

作者：

Eppinger, Ben ^{[1
]}

Kray, Jutta ^{[1
]}

Mecklinger, Axel ^{[1
]}

John, Oliver ^{[1
]}

机构：

[1] Univ Saarland, Dept Psychol, D-66041 Saarbrucken, Germany

来源：

BIOLOGICAL PSYCHOLOGY | 2007年 / 75卷 / 01期

关键词：

age differences; response monitoring; task switching; conflict processing; ERP; Stroop task;

D O I：

10.1016/j.biopsycho.2006.12.001

中图分类号：

B84 [心理学];

学科分类号：

04 ; 0402 ;

摘要：

This study investigates age differences in the flexible adaptation to changing demands on task switching and conflict processing. We applied a cued task-switching version of the Stroop task and manipulated the ratio of conflict trials. During task preparation, the P300 varied as a function of conflict ratio and a later positive component was larger for switch than non-switch trials. Stimulus-related conflict processing as indicated by a negativity for incompatible trials (Ni) was delayed for older adults. Moreover, the Ni varied as a function of conflict ratio and was larger for switch than for non-switch trials. Age differences were also obtained in the correct response negativity (CRN). CRN was larger on incompatible trials and this CRN-compatibility effect was enhanced when incompatible trials were infrequent in younger, but not in older adults. Our findings suggest impairments of older adults primarily in response-related conflict processing and in the flexible adaptation to changing task contexts. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：52 / 67

页数：16

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