Villing Rudi C, Repp Bruno H, Ward Tomas E, Timoney Joseph M
National University of Ireland Maynooth, Maynooth, Ireland.
Atten Percept Psychophys. 2011 Jul;73(5):1614-29. doi: 10.3758/s13414-011-0110-1.
The perceptual center (P-center) is fundamental to the timing of heterogeneous event sequences, including music and speech. Unfortunately, there is currently no comprehensive and reliable model of P-centers in acoustic events, so P-centers must instead be measured empirically. This study reviews existing measurement methods and evaluates two methods in detail-the rhythm adjustment method and a new method based on the phase correction response (PCR) in a synchronous tapping task. The two methods yielded consistent P-center estimates and showed no evidence of P-center context dependence. The PCR method appears promising because it is accurate and efficient and does not require explicit perceptual judgments. As a secondary result, the magnitude of the PCR is shown to vary systematically with the onset complexity of speech sounds, which presumably reflects the perceived clarity of a sound's P-center.
感知中心（P中心）对于包括音乐和语音在内的异质事件序列的计时至关重要。不幸的是，目前尚无关于声学事件中P中心的全面且可靠的模型，因此必须通过实证测量P中心。本研究回顾了现有的测量方法，并详细评估了两种方法——节奏调整法和一种基于同步敲击任务中的相位校正响应（PCR）的新方法。这两种方法得出了一致的P中心估计值，且未显示出P中心上下文依赖性的证据。PCR方法似乎很有前景，因为它准确、高效且不需要明确的感知判断。作为一个次要结果，研究表明PCR的大小随语音声音的起始复杂性而系统变化，这大概反映了声音P中心的感知清晰度。
