Disfluency in Spontaneous Speech (DiSS'01)
August 29-31, 2001
There is a theoretical controversy regarding when the selfmonitoring process interrupts the speech stream. One view holds that the speech stream is interrupted as soon as an error is detected. Another view holds that, even after an error is detected, the speaker does not interrupt immediately but continues speaking and at the same time plans the upcoming repair. We address this question by observing speech-accompanying gestures at the moment of speech disfluency. The results show that the concurrent gestural movements are typically stopped on average 240 ms before speech is stopped. In other words, the gesture suspension foreshadows the speech suspension. The gestural foreshadowing shows that the speaker must know early on that he is going to suspend speech. The gestural indication of an upcoming speech suspension suggests that the speaker does not interrupt speech at the very moment s/he detects an error. This result supports the hypothesis on speech monitoring stating that the speaker continues to talk after error detection and at the same time plans the upcoming repair.
Bibliographic reference. Seyfeddinipur, Mandana / Kita, Sotaro (2001): "Gesture as an indicator of early error detection in self-monitoring of speech", In DISS'01, 29-32.