Stuttering and Speech Naturalness

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Abstract
Thirty listeners used the 9-point speech naturalness rating scale described by Martin, Haroldson, and Triden (1984) to score 1-minute spontaneous speaking samples from 15 normally fluent speakers and 15 stutterers who had completed the initial phases of a prolonged speech treatment program. The same listeners were later asked to judge whether each sample was from a stutterer or from a normal speaker. Reliable listeners identified almost identical numbers of samples from both speaker groups as "normal speakers," but the stutterers received significantly higher scores on the rating scale, indicating that their speech was judged more unnatural sounding. The speech samples incorporated those used in a related study by Ingham and Packman (1978), thus permitting a reevaluation of the findings of that study.

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