The hard oddball: Effects of difficult response selection on stimulus-related P3 and on response-related negative potentials
The hard oddball: Effects of difficult response selection on stimulus-related P3 and on response-related negative potentials
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DOI：
10.1111/psyp.12262
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发表时间：
2014-11-01
期刊：
影响因子：
3.7
通讯作者：
Smigasiewicz, Kamila
中科院分区：
文献类型：
--
作者：
Verleger, Rolf;Baur, Nikolas;Smigasiewicz, Kamila
P3 b成分的ERPs已被提出，以反映决策，或者，激活刺激反应链接，或者，依赖于刺激处理。这三种观点对反应选择的难度如何影响古怪效应做出了不同的预测。在三个实验中，频繁和罕见的目标伴随着辅助刺激。大的古怪P3 BS，引起罕见的目标，大大减少了反应时，必须选择结合信息的目标和辅助刺激。难反应选择与罕见的目标，也反映了一个大的额中央负波，这可以从P3 b分离时，目标和辅助刺激之间的时间间隔不同，因此，并没有导致P3 b的减少。它的结论是，通常增加P3 b与罕见的任务相关的目标取决于存在现成的刺激-反应链接。
The P3b component of ERPs has been proposed to reflect decisions or, alternatively, activation of stimulus-response links or, alternatively, to depend on stimulus processing only. These three views make different predictions about how difficulty of response selection will affect the oddball effect. In three experiments, frequent and rare targets were accompanied by ancillary stimuli. Large oddball-P3bs, evoked by rare targets, were greatly reduced when responses had to be selected by combining information from targets and ancillary stimuli. Difficult response selection with rare targets was also reflected by a large frontocentral negativity, which could be separated from P3b when intervals were varied between targets and ancillary stimuli, and, therefore, did not cause P3b reduction. It is concluded that the usual increase of P3b with rare task-relevant targets depends on the existence of readily available stimulus-response links.