Can a regular context induce temporal orienting to a target sound?
Can a regular context induce temporal orienting to a target sound?
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DOI：
10.1016/j.ijpsycho.2010.08.003
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发表时间：
2010-12-01
影响因子：
3
通讯作者：
Lange, Kathrin
中科院分区：
文献类型：
--
作者：
Lange, Kathrin
最近（Lange, 2009）的研究表明，当引发刺激可预测地遵循规则与不规则序列时，听觉事件相关电位（ERP）的N1会减弱。这可能是由规则序列引起的时间定向的标志。或者，衰减的N1可能是由于目标时间的感觉可预测性。本研究探讨了当靶标时间不可预测时，呈现规则序列是否仍会减弱靶标N1。在目标音调之前呈现规则（与不规则）的音调序列，目标音调在序列之后的三个不同时间点之一不可预测地出现。对于规则序列，目标要么持续规律（准时目标），要么相对于这个规则时间点早或晚。将准时目标的erp作为序列规则的函数进行比较。与N1衰减反映靶时间感官可预测性的假设一致，在靶时间不确定的情况下，本研究未观察到衰减的N1。(C) 2010 Elsevier B.V.版权所有
It has been shown recently (Lange, 2009) that the N1 of the auditory event related potential (ERP) is attenuated when the eliciting stimulus predictably follows a regular vs. an irregular sequence. This may be a sign of temporal orienting induced by the regular sequence. Alternatively, the attenuated N1 may have been due to sensory predictability of target timing. The present study investigated whether presenting a regular sequence still attenuates target N1 when target timing is unpredictable. A regular (vs. irregular) tone sequence was presented prior to a target tone, which appeared unpredictably at one of three different time points after the sequence. For the regular sequence, targets either continued regularity (on-time targets) or were early or late with respect to this regular time point. ERPs to on-time targets were compared as a function of sequence regularity. Consistent with the assumption that N1 attenuation reflects sensory predictability of target timing, an attenuated N1 was not observed in the present study, where target timing was uncertain. (C) 2010 Elsevier B.V. All rights reserved.