Comparisons of audio and audiovisual measures of stuttering frequency and severity in preschool-age children

Rousseau, Isabelle, Onslow, Mark, Packman, Ann and Jones, Mark (2008) Comparisons of audio and audiovisual measures of stuttering frequency and severity in preschool-age children. American Journal of Speech-Language Pathology, 17 2: 173-178. doi:10.1044/1058-0360(2008/017)

Author Rousseau, Isabelle
Onslow, Mark
Packman, Ann
Jones, Mark
Title Comparisons of audio and audiovisual measures of stuttering frequency and severity in preschool-age children
Journal name American Journal of Speech-Language Pathology   Check publisher's open access policy
ISSN 1058-0360
Publication date 2008-05
Sub-type Article (original research)
DOI 10.1044/1058-0360(2008/017)
Open Access Status
Volume 17
Issue 2
Start page 173
End page 178
Total pages 6
Place of publication Rockville, Md., U.S.A.
Publisher American Speech-Language-Hearing Association
Language eng
Subject 1103 Clinical Sciences
Formatted abstract
Purpose: To determine whether measures of stuttering frequency and measures of overall stuttering severity in preschoolers differ when made from audio-only recordings compared with audiovisual recordings.
Method: Four blinded speech-language pathologists who had extensive experience with preschoolers who stutter measured stuttering frequency and rated overall severity from audioonly and audiovisual recordings of 36 preschool children who were stuttering. Stuttering frequency (percentage of syllables stuttered [%SS]) was based on counts of perceptually unambiguous stutterings, made in real time, and overall severity was measured using a 9-point rating scale.
Results: Stuttering frequency was statistically significantly lower by around 20% when made from audio-only recordings. This was found to be directly attributable to differences in the counts of stuttered syllables, rather than to differences in the total numbers of syllables spoken. No significant differences were found between recording modalities for the ratings of overall severity. Correlations between %SS scores in the 2 modalities and severity rating scores in the 2 modalities were high, indicating that observers agreed on data trends across speech samples.
Conclusions: Measures of %SS made from audio-only recordingsmay underestimate stuttering frequency in preschoolers. Although audio-only %SS measures may underestimate stuttering frequency at the start of a clinical trial to a clinically significant extent, posttreatment scores at or below 1.0%SS are likely to underestimate by 0.2%SS or less, which is clinically insignificant.
Keyword Stuttering severity
Stutter count
Stuttered syllables
Audiovisual resources
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Public Health Publications
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Created: Thu, 03 Sep 2009, 10:09:36 EST by Mr Andrew Martlew on behalf of Faculty Of Health Sciences