Abstract
Fluency is disrupted in the normal speaker by the application of delayed side-tone. In the stutterer, it is enhanced under this condition. Speech breakdown appears to be linked with how the individual hears his own speech. Some normal speakers are able to defeat the effects of delayed side-tone by concentrating on proprioceptive feedback from oral structures and from the larynx. It is hypothesized that stutterers experience an improvement in fluency under delayed feedback because under these conditions proprioceptive sensations become dominant over auditory sensations in the monitoring processes.

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