Repp Bruno H
CHaskins Laboratories, 270 Crown Street, New Haven, CT 06511-6695, USA.
J Mot Behav. 2002 Sep;34(3):291-8. doi: 10.1080/00222890209601947.
In models of sensorimotor synchronization, it is generally assumed that phase correction occurs in response to information about sensorimotor asynchrony or relative phase. Without such feedback, a phase perturbation in the motor activity should not be followed by phase correction. Alternatively, internally generated temporal expectations could provide a basis for phase correction in the absence of feedback. To test those hypotheses, the author conducted an experiment in which participants (N = 8) tapped their finger in synchrony with isochronous auditory sequences containing a single shifted event onset, after which there could be a gap of up to 3 missing events. Participants were instructed to not react to the shifted event and to continue tapping regularly during any gap. The shifted event caused an involuntary phase shift of the following tap. The shift was corrected if the sequence continued, but during a gap, the shift persisted without correction. Those results confirm that sensory feedback is necessary for phase correction to occur.
在感觉运动同步模型中，通常认为相位校正会根据感觉运动异步或相对相位的信息而发生。没有这种反馈，运动活动中的相位扰动之后不应进行相位校正。或者，在没有反馈的情况下，内部产生的时间预期可以为相位校正提供基础。为了检验这些假设，作者进行了一项实验，让参与者（N = 8）与包含单个移位事件起始的等时听觉序列同步轻敲手指，之后可能会有长达3个缺失事件的间隙。参与者被指示不对移位事件做出反应，并在任何间隙期间继续有规律地轻敲。移位事件导致后续轻敲出现非自愿的相位偏移。如果序列继续，该偏移会被校正，但在间隙期间，该偏移会持续且未被校正。这些结果证实了感觉反馈对于相位校正的发生是必要的。
