Snyder Joel S, Pasinski Amanda C, McAuley J Devin
Department of Psychology, University of Nevada Las Vegas, Las Vegas, NevadaDepartment of Psychology, Bowling Green State University, Bowling Green, OhioDepartment of Psychology, Michigan State University, East Lansing, Michigan.
Psychophysiology. 2011 Feb;48(2):198-207. doi: 10.1111/j.1469-8986.2010.01053.x.
A recently described auditory tempo perception paradigm revealed individual differences in perceived stimulus timing for identical stimulus sequences. The current study takes advantage of this paradigm by recording event-related potentials (ERPs) concurrent with task performance in order to reveal brain responses that reflect individual differences in timing strategy. No strategy-related differences were observed in sensory encoding of tones, as measured by the P1-N1-P2 complex. However, the contingent negative variation (CNV) leading up to the final tone of the sequence varied as a function of strategy, as did a parietal-maximum late positive component (P3b) that occurred following the final tone. These data suggest that temporal expectancy for and cognitive processing of the final tone of rhythmic sequences underlies differences in strategy during rhythm perception.
最近描述的一种听觉节奏感知范式揭示了相同刺激序列在感知刺激时间方面的个体差异。本研究利用这一范式，通过在任务执行过程中记录事件相关电位（ERP），以揭示反映时间策略个体差异的大脑反应。通过P1-N1-P2复合波测量发现，在音调的感觉编码中未观察到与策略相关的差异。然而，序列最后一个音调之前的关联性负变化（CNV）随策略而变化，序列最后一个音调之后出现的顶叶最大晚期正成分（P3b）也是如此。这些数据表明，节奏序列最后一个音调的时间预期和认知处理是节奏感知过程中策略差异的基础。
