Sound Production Treatment: Synthesis and Quantification of Outcomes Purpose This investigation was designed to provide a quantification and synthesis of a series of single-case experimental design investigations into the effects of sound production treatment, an articulatory-kinematic treatment for acquired apraxia of speech (AOS). The main purpose was to perform a meta-analysis of aggregated sound production treatment data in ... Supplement Article
Supplement Article  |   November 01, 2015
Sound Production Treatment: Synthesis and Quantification of Outcomes
 
Author Affiliations & Notes
  • Dallin J. Bailey
    Researchers at the Aphasia and Apraxia of Speech Research Program, VA Salt Lake City Health Care System, UT
    University of Utah, Salt Lake City
  • Kelly Eatchel
    Researchers at the Aphasia and Apraxia of Speech Research Program, VA Salt Lake City Health Care System, UT
    University of Utah, Salt Lake City
  • Julie Wambaugh
    Researchers at the Aphasia and Apraxia of Speech Research Program, VA Salt Lake City Health Care System, UT
    University of Utah, Salt Lake City
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication. ×
  • Correspondence to Dallin Bailey: dallinbailey@gmail.com
  • Editor: Anastasia Raymer
    Editor: Anastasia Raymer×
  • Associate Editor: Jack Ryalls
    Associate Editor: Jack Ryalls×
Article Information
Speech, Voice & Prosodic Disorders / Apraxia of Speech & Childhood Apraxia of Speech / Research Issues, Methods & Evidence-Based Practice / Supplement: Select Papers From the 44th Clinical Aphasiology Conference
Supplement Article   |   November 01, 2015
Sound Production Treatment: Synthesis and Quantification of Outcomes
American Journal of Speech-Language Pathology, November 2015, Vol. 24, S798-S814. doi:10.1044/2015_AJSLP-14-0127
History: Received August 29, 2014 , Revised January 16, 2015 , Accepted February 11, 2015
 
American Journal of Speech-Language Pathology, November 2015, Vol. 24, S798-S814. doi:10.1044/2015_AJSLP-14-0127
History: Received August 29, 2014; Revised January 16, 2015; Accepted February 11, 2015
Web of Science® Times Cited: 1

Purpose This investigation was designed to provide a quantification and synthesis of a series of single-case experimental design investigations into the effects of sound production treatment, an articulatory-kinematic treatment for acquired apraxia of speech (AOS). The main purpose was to perform a meta-analysis of aggregated sound production treatment data in order to provide benchmarks to serve as indicators of magnitude of change. Additional analyses explored various factors influencing effect sizes and level of performance.

Method Effect sizes were calculated for treated and untreated items for 24 participants across 10 investigations. Benchmarks were calculated as the quartiles of the distributions of the effect sizes. Correlational analyses were performed to examine (a) end-of-treatment performance relative to follow-up performance, (b) response of trained items relative to untrained items, and (c) effect size relative to participant variables.

Results Effect sizes were predominantly large and positive; benchmarks for treated items were larger than those for untreated items. End of treatment and follow-up performance were positively correlated, and response generalization was positively correlated with AOS severity.

Conclusion These benchmarks may assist in evaluating the effects of interventions for individuals with AOS utilizing similar outcome measures in both clinical and research settings.

Acknowledgments
This work was supported by Merit Review Award #RX-000363-01A1 from the United States (U.S.) Department of Veterans Affairs Rehabilitation Research and Development Service. The contents do not represent the views of the U.S. Department of Veterans Affairs or the United States Government. In addition, this investigation was supported by the University of Utah Study Design and Biostatistics Center, with funding in part from the National Center for Research Resources and the National Center for Advancing Translational Sciences, National Institutes of Health, Grant 5UL1TR001067-02 (formerly 8UL1TR000105 and UL1RR025764).
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