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Effect Of Delayed Auditory Feedback, Speech Rate, And Sex On Speech Production
Summary .— Perturbations in Delayed Auditory Feedback (DAF) and speech rate were examined as sources of disruptions in speech between men and women. Fluent adult men ( n = 16) and women ( n = 16) spoke at a normal and an imposed
fast rate of speech with 0, 25, 50, 100, and 200 msec. DAF. The syllable rate signifi - cantly increased when participants were instructed to speak at a fast rate, and the syllable rate decreased with increasing DAF delays. Men's speech rate was signifi - cantly faster during the fast speech rate condition with a 200 msec. DAF. Disfl uencies
increased with increasing DAF delay. Signifi cantly more disfl uency occurred at delays of 25 and 50 msec. at the fast rate condition, while more disfl uency occurred at 100 and 200 msec. in normal rate conditions. Men and women did not display differences in the number of disfl uencies. These fi ndings demonstrate sex diff erences in susceptibility to perturbations in DAF and speech rate suggesting feedforward/feedback subsystems that monitor vocalizations may be diff erent between sexes.
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