Age differences in task switching and response monitoring: Evidence from ERPs
Age differences in task switching and response monitoring: Evidence from ERPs
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DOI：
10.1016/j.biopsycho.2006.12.001
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发表时间：
2007-04-01
影响因子：
2.6
通讯作者：
John, Oliver
中科院分区：
文献类型：
--
作者：
Eppinger, Ben;Kray, Jutta;John, Oliver
本研究考察了任务转换和冲突处理中灵活适应变化要求的年龄差异。我们采用了线索任务切换版本的Stroop任务和操纵的冲突试验的比例。在任务准备过程中，P300变化的功能冲突比和后来的积极成分是开关比非开关试验大。刺激相关的冲突处理所表示的不兼容的试验（镍）的负面延迟老年人。此外，镍变化的函数的冲突比，开关比非开关试验。在正确反应阴性（CRN）中也获得了年龄差异。CRN是较大的不兼容的试验，这种CRN兼容性的影响增强时，不兼容的试验很少在年轻人，但不是在老年人。我们的研究结果表明，老年人主要在反应相关的冲突处理和灵活适应不断变化的任务环境的损害。(c)2006 Elsevier B.V.保留所有权利。
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.