The Influence of Noise on Stutterers' Different Disfluency Types

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Abstract
The purpose of this study was to determine the effects of noise on the types of disfluencies of stutterers. Seventeen adult stutterers read prose aloud in the presence of a white noise (95 dB SPL). The frequency of types of disfluencies was determined and compared to the frequency of types of disfluencies obtained in a control condition. The presence of noise significantly reduced the total number of instances of disfluency behaviors. It significantly influenced only those disfluency types (part-word repetitions) that had a high frequency of occurrence during control. The findings indicate that the effect of noise on disfluency appears only for disfluency types that occur with a relatively high frequency in the control condition.

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