The Chinese University of Hong Kong, Hong Kong, SAR, China.
Neurosci Lett. 2011 Jan 10;487(3):268-72. doi: 10.1016/j.neulet.2010.10.035. Epub 2010 Oct 21.
The pre-attentive processing of Cantonese tones was studied with an auditory passive oddball paradigm. Event-related potentials to standard and deviant auditory stimuli were recorded as participants watched a silent movie attentively. The standards and deviants differed in either pitch level or pitch contour. Mismatch negativity (MMN) and P3a were elicited by all types of deviant tones, suggesting that lexical tone was processed pre-attentively. In addition, the size and latency of MMN were sensitive to the size of pitch level change, while the latency of P3a captured the presence of pitch contour change. These results indicate that pitch contour and pitch height are two important dimensions in sensory processing of lexical tones.
采用听觉被动Oddball 范式研究了粤语声调的前注意加工。当参与者专注地观看无声电影时，记录了标准和偏差听觉刺激的事件相关电位。标准和偏差在音高水平或音高轮廓上有所不同。所有类型的偏差音都引起了失匹配负波（MMN）和 P3a，表明词汇音在注意前就被处理了。此外，MMN 的大小和潜伏期对音高水平变化的大小敏感，而 P3a 的潜伏期则捕捉到音高轮廓变化的存在。这些结果表明，音高轮廓和音高高度是词汇音感处理的两个重要维度。
