Characterizing Intonation Deficit in Motor Speech Disorders: An Autosegmental–Metrical Analysis of Spontaneous Speech in Hypokinetic Dysarthria, Ataxic Dysarthria, and Foreign Accent Syndrome PurposeThe autosegmental–metrical (AM) framework represents an established methodology for intonational analysis in unimpaired speaker populations but has found little application in describing intonation in motor speech disorders (MSDs). This study compared the intonation patterns of unimpaired participants (CON) and those with Parkinson’s disease (PD), ataxic dysarthria (AT), and foreign accent ... Article
Article  |   October 01, 2012
Characterizing Intonation Deficit in Motor Speech Disorders: An Autosegmental–Metrical Analysis of Spontaneous Speech in Hypokinetic Dysarthria, Ataxic Dysarthria, and Foreign Accent Syndrome
 
Author Affiliations & Notes
  • Anja Lowit
    University of Strathclyde, Glasgow, Scotland
  • Anja Kuschmann
    University of Strathclyde, Glasgow, Scotland
  • Correspondence to Anja Lowit: a.lowit@strath.ac.uk
  • Editor: Anne Smith
    Editor: Anne Smith×
  • Associate Editor: Wolfram Ziegler
    Associate Editor: Wolfram Ziegler×
Article Information
Speech, Voice & Prosodic Disorders / Dysarthria / Special Populations / Cultural & Linguistic Diversity / Speech, Voice & Prosody / Speech
Article   |   October 01, 2012
Characterizing Intonation Deficit in Motor Speech Disorders: An Autosegmental–Metrical Analysis of Spontaneous Speech in Hypokinetic Dysarthria, Ataxic Dysarthria, and Foreign Accent Syndrome
Journal of Speech, Language, and Hearing Research, October 2012, Vol. 55, 1472-1484. doi:10.1044/1092-4388(2012/11-0263)
History: Received September 20, 2011 , Revised January 16, 2012 , Accepted February 24, 2012
 
Journal of Speech, Language, and Hearing Research, October 2012, Vol. 55, 1472-1484. doi:10.1044/1092-4388(2012/11-0263)
History: Received September 20, 2011; Revised January 16, 2012; Accepted February 24, 2012
Web of Science® Times Cited: 7

PurposeThe autosegmental–metrical (AM) framework represents an established methodology for intonational analysis in unimpaired speaker populations but has found little application in describing intonation in motor speech disorders (MSDs). This study compared the intonation patterns of unimpaired participants (CON) and those with Parkinson’s disease (PD), ataxic dysarthria (AT), and foreign accent syndrome (FAS) to evaluate the approach’s potential for distinguishing types of MSDs from each other and from unimpaired speech.

MethodSpontaneous speech from 8 PD, 8 AT, 4 FAS, and 10 CON speakers were analyzed in relation to inventory and prevalence of pitch patterns, accentuation, and phrasing. Acoustic-phonetic baseline measures (maximum-phonation-duration, speech rate, and F0-variability) were also performed.

ResultsThe analyses yielded differences between MSD and CON groups and between the clinical groups in regard to prevalence, accentuation, and phrasing. AT and FAS speakers used more rising and high pitch accents than PD and CON speakers. The AT group used the highest number of pitch accents per phrase, and all 3 MSD groups produced significantly shorter phrases than the CON group.

ConclusionsThe study succeeded in differentiating MSDs on the basis of intonational performances by using the AM approach, thus, demonstrating its potential for charting intonational profiles in clinical populations.

Acknowledgments
This study was supported by British Academy Grant SG-44232, Ataxia U.K. and Parkinson’s U.K. Grant 8381 as well as a University of Strathclyde Research Development fund. We thank the participants of the various studies for their time and enthusiasm.
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