Age dependent changes of distractibility and reorienting of attention revisited: An event-related potential study
Age dependent changes of distractibility and reorienting of attention revisited: An event-related potential study
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DOI：
10.1016/j.brainres.2012.11.009
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发表时间：
2013-01-23
期刊：
影响因子：
2.9
通讯作者：
Schroeger, Erich
中科院分区：
文献类型：
--
作者：
Berti, Stefan;Grunwald, Martin;Schroeger, Erich
三个年龄组（18-27，39-45，和59-66岁）的成年人进行了短（200毫秒）或长（400毫秒）正弦音调的听觉持续时间的歧视任务。表现是高度准确的，反应时间在所有组中处于相同的水平，表明听觉持续时间处理没有差异。任务无关的罕见的变化的频率的刺激，以检查是否被试，首先，分心的环境变化，而专注于任务相关的信息（由延长的反应），其次，可以重新专注于相关的任务后分心。结果表明，分散注意力的效果是存在于所有群体。重要的是，59-66岁组的行为分心效应几乎是其他组的两倍。事件相关脑电位（ERPs）显示所有组中存在的异常诱发的错配负波（MMN）、P3 a和重定向负波（罗恩）。这些ERP组件上的老化效应在所有三个组件中都可以观察到，但只显示了对MMN的微弱显着影响。两者合计，行为和ERP的结果表明，平衡处理任务无关的刺激变化，同时专注于任务相关信息的功能是有效的，在成年期，直到第7个十年的生活。(C)2012爱思唯尔有限公司版权所有。
Adults of three age groups (18-27, 39-45, and 59-66 years) performed an auditory duration discrimination task with short (200 ms) or long (400 ms) sinusoidal tones. Performance was highly accurate and reaction times were on the same level in all groups, indicating no differences in auditory duration processing. Task irrelevant rare changes of the frequency of the stimuli were introduced to check whether the subjects, firstly, were distracted by changes in the environment while focusing on the task relevant information (indicated by prolonged responses), and, secondly, could re-focus on the relevant task after distraction. The results show that a distraction effect is present in all groups. Importantly, the 59-66 years group showed a behavioral distraction effect nearly twice as high as the other groups. The event-related brain potentials (ERPs) show mismatch negativity (MMN), P3a, and reorienting negativity (RON) elicited by deviants which are present in all groups. Aging effects on these ERP components were observable in all three components but a revealed a weak significant effect for the MMN only. Taken together, the behavioral and ERP results suggest that the function of balancing the processing of task irrelevant changes in the stimulation while focusing on task relevant information is effective during adulthood until the 7th decade of life. (C) 2012 Elsevier B.V. All rights reserved.