The Aphasiology Archive
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Sound production treatment for apraxia of speech: overgeneralization and maintenance effects

Wambaugh, Julie L. and Martinez, Aida L. and McNeil, Malcolm R. and Rogers, Margaret A.
Sound production treatment for apraxia of speech: overgeneralization and maintenance effects. Aphasiology, 13(9-11), 1999, pages 821-837.


This investigation was designed to examine the effects of a sound production training program on the production of selected sounds from a speaker with apraxia of speech and Broca's aphasia. Treatment combined modelling-repetition, integral stimulation, articulatory placement cueing and minimal contrast practice and was applied sequentially to three sounds in the context of a multiple baseline design. Despite positive acquisition and response generalization effects for all trained sounds, maintenance effects, measured during the training phase of the next targeted sound, exhibited marked declines relative to the level of sound production accuracy that had been achieved during training. A detailed analysis of production errors indicated that overgeneralization of the target sound undergoing training was the most consistent factor contributing to the decline. Preliminary evidence is provided supporting the importance of using multiple sound targets to increase variability during training, and ostensibly, stabilization of learning.

EPrint Type:Journal (Paginated)
ID Code:1155
Conference:Clinical Aphasiology Conference: Clinical Aphasiology Conference (1998 : 28th : Asheville, NC : June 1998)
Conference Date:June 1998
Publisher:Taylor & Francis
Publication Location:London
Alternative Locations:,
Additional Information:Access to Full Text is subject to the Publisher's access restrictions