Testing the stimulus-to-response bridging function of the oddball-P3 by delayed response signals and residue iteration decomposition (RIDE)
Testing the stimulus-to-response bridging function of the oddball-P3 by delayed response signals and residue iteration decomposition (RIDE)
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DOI：
10.1016/j.neuroimage.2014.06.036
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发表时间：
2014-10
期刊：
影响因子：
5.7
通讯作者：
R. Verleger;Marvin F. Metzner;G. Ouyang;K. Śmigasiewicz;Changsong Zhou
中科院分区：
文献类型：
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作者：
R. Verleger;Marvin F. Metzner;G. Ouyang;K. Śmigasiewicz;Changsong Zhou
事件相关电位（ERP）的P3 b成分反映了对目标刺激的反应联系。这个建议进行了测试，断开目标刺激和反应之间的时间联系，并通过应用残留迭代分解（RIDE）分离的ERP组件刺激锁定，响应锁定，和“中间”集群。在对频繁（80%）和罕见（20%）的目标字母做出反应时，必须按下左或右键，但反应必须等待“开始”信号（在90%的试验中出现）。在块之间，从目标到go信号的刺激起始时间（SOA）从0 ms到800 ms不等。罕见的目标，其罕见的反应，预计会引起大的P3 bs（“古怪的效果”）。如果仅与刺激处理相关，则这种影响在所有SOA中都同样大，并将由RIDE的刺激集群建模。如果只与响应启动相关，则古怪效应将由go信号而不是目标引起，并将由RIDE的响应群集建模。如果指示罕见刺激与其罕见响应的整合，则古怪效应将由目标引起，但将在SOA中减少和拉伸，并将由RIDE的中间集群建模。RIDE分析在很大程度上证实了后一种观点。SOA效应与刺激-反应-链接观点的预测最匹配，尽管不是完美的。这些结果需要一个精细的解释P3 b的古怪效应的刺激-反应耦合。
It has been proposed that the P3b component of event-related potentials (ERPs) reflects linking of responses to target stimuli. This proposal was tested by disconnecting the temporal link between target stimuli and responses, and by applying residue iteration decomposition (RIDE) for separating the ERP components into stimulus-locked, response-locked, and “intermediate” clusters. Left or right keys had to be pressed in response to frequent (80%) and rare (20%) target letters, but responses had to wait for “go” signals (appearing in 90% of trials). Between blocks, stimulus-onset asynchronies (SOAs) from targets to go-signals varied from 0 ms to 800 ms. Rare targets with their rare responses were expected to evoke large P3bs (“oddball effect”). If related to stimulus processing only, this effect will be equally large across all SOAs and will be modeled by RIDE's stimulus-cluster. If related to response initiation only, the oddball effect will be evoked by go-signals rather than by targets and will be modeled by RIDE's response-cluster. If indicating integration of rare stimuli with their rare responses, the oddball effect will be evoked by targets but will be reduced and stretched in time across SOAs and will be modeled by RIDE's intermediate cluster. RIDE analysis confirmed this latter view, for the most part. SOA effects matched best, though not perfectly, predictions made by the stimulus–response-link view. These results call for a refined account of the oddball effect on P3b in terms of stimulus–response coupling.