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Journal of Speech and Hearing Research Vol.38 280-288 April 1995.
© American Speech-Language-Hearing Association
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Perceptual Rating Instrument for Speech Evaluation of Stuttering Treatment

Marie-Christine Franken 1
Louis Boves 2
Herman F. M. Peters 1

Ronald L. Webster 3
1 Department of Voice and Speech Pathology University of Nijmegen Nijmegen, The Netherlands
2 Department of Language and Speech University of Nijmegen Nijmegen, The Netherlands
3 Hollins Communications Research Institute Hollins College Roanoke, VA

A rating instrument is described that can be used to assess the results of stuttering treatments. The instrument is designed for use with naive listeners. It yields a comprehensive and detailed description of the speech quality in terms of articulation, phonation, pitch, and loudness; in addition, it includes a naturalness scale. Analysis of ratings obtained with the instrument show that naturalness is a multidimensional characteristic. Moreover, the speech characteristics that determine the naturalness ratings appear to be different pretreatment, posttreatment, and at follow-up treatment.

The psychometric characteristics of the instrument are analyzed in detail. It is concluded that mixing of samples of stutterers and nonstutterers in one rating experiment may artificially inflate the reliability of the ratings. Also, ratings on equal-appearing interval scales cannot be interpreted in an absolute sense. Solutions for this methodological problem are suggested.

KEY WORDS: speech evaluation, stuttering treatment, perceptual rating of speech, rating instruments

Submitted on November 11, 1993
Accepted on September 15, 1994


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Copyright © 1995 by the American Speech-Language-Hearing Association.