Sams Mikko, Möttönen Riikka, Sihvonen Toni
Laboratory of Computational Engineering, Helsinki University of Technology, PO Box 9203, FIN-02015 HUT, Finland.
Brain Res Cogn Brain Res. 2005 May;23(2-3):429-35. doi: 10.1016/j.cogbrainres.2004.11.006. Epub 2005 Jan 8.
We studied the modification of auditory perception in three different conditions in twenty subjects. Observing other person's discordant articulatory gestures deteriorated identification of acoustic speech stimuli and modified the auditory percept, causing a strong McGurk effect. A similar effect was found when the subjects watched their own silent articulation in a mirror and acoustic stimuli were simultaneously presented to their ears. Interestingly, a smaller but significant effect was even obtained when the subjects just silently articulated the syllables without visual feedback. On the other hand, observing other person's or one's own concordant articulation and silently articulating a concordant syllable improved identification of the acoustic stimuli. The modification of auditory percepts caused by visual observation of speech and silently articulating it are both suggested to be due to the alteration of activity in the auditory cortex. Our findings support the idea of a close relationship between speech perception and production.
我们研究了20名受试者在三种不同条件下听觉感知的变化。观察他人不协调的发音手势会降低对语音刺激的识别能力，并改变听觉感知，从而产生强烈的麦格克效应。当受试者在镜子中观看自己的无声发音并同时向其耳朵呈现声音刺激时，也发现了类似的效应。有趣的是，当受试者只是无声地发出音节而没有视觉反馈时，甚至也获得了较小但显著的效应。另一方面，观察他人或自己协调的发音以及无声地发出协调的音节会提高对声音刺激的识别能力。语音视觉观察和无声发音所引起的听觉感知变化都被认为是由于听觉皮层活动的改变。我们的研究结果支持了语音感知与产生之间存在密切关系的观点。
