American Journal of Speech-Language Pathology Vol.21 S5-S27 May 2012. doi:10.1044/1058-0360(2011/11-0102)
© American Speech-Language-Hearing Association
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Select Papers From the 41st Clinical Aphasiology Conference

Acquired Apraxia of Speech: The Effects of Repeated Practice and Rate/Rhythm Control Treatments on Sound Production Accuracy

Julie L. Wambaugha,,b
Christina Nesslera
Rosalea Camerona,,b
Shannon C. Mauszyckia,,b
a VA Salt Lake City Health Care System, UT
b University of Utah, Salt Lake City

Correspondence to Julie Wambaugh: Julie.wambaugh{at}health.utah.edu

Purpose: This investigation was designed to elucidate the effects of repeated practice treatment on sound production accuracy in individuals with apraxia of speech (AOS) and aphasia. A secondary purpose was to determine if the addition of rate/rhythm control to treatment provided further benefits beyond those achieved with repeated practice.

Method: A single-subject design was employed with 10 speakers with chronic AOS and aphasia. Articulation accuracy served as the dependent measure. Participants received repeated practice treatment until a plateau in performance was observed or high levels of accuracy were achieved. If performance criterion was not reached, rate/rhythm control was added to the treatment to determine if additional gains would be made.

Results: For 8 of the participants, improvements were evident for all applications of repeated practice treatment, and positive response generalization was observed in most cases. When rate/rhythm control treatment was applied, modest additional gains were apparent for the majority of the applications. The 2 participants who did not benefit from repeated practice treatment also did not show improvements with rate/rhythm control treatment.

Conclusions: Repeated practice treatment resulted in improved articulation for the majority of participants. The amount of improvement varied within and across participants. Rate/rhythm control appeared to have limited additional benefits for some participants.

Key Words: apraxia, treatment, articulation


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J. L. Wambaugh, C. Nessler, R. Cameron, and S. C. Mauszycki
Treatment for Acquired Apraxia of Speech: Examination of Treatment Intensity and Practice Schedule
Am J Speech Lang Pathol, February 1, 2013; 22(1): 84 - 102.
[Abstract] [Full Text] [PDF]