Model-driven treatment of childhood apraxia of speech (van der Merwe & Steyn, 2017)

2017-12-08T23:30:56Z (GMT) by Anita van der Merwe Mollie Steyn
<div><b>Purpose: </b>The aim of the study was to propose the speech motor learning approach (Van der Merwe, 2011) as a treatment for childhood apraxia of speech and to determine if it will effect positive change in the ability of a 33-month-old child to produce untreated nonwords and words containing treated age-appropriate consonants (Set 1 sounds), untreated age-appropriate consonants (Set 2), and untreated age-inappropriate consonants (Set 3) and also to determine the nature and number of segmental speech errors before and after treatment.</div><div><b>Method: </b>An A-B design with multiple target measures and follow-up was implemented to assess the effects of treatment of Set 1. Effect sizes for whole-word accuracy were determined, and two criterion lines were generated following the conservative dual criterion method. Speech errors were judged perceptually.</div><div><b>Results:</b> Conservative dual criterion analyses indicated no reliable treatment effect due to rising baseline scores. Effect sizes showed significant improvement in whole-word accuracy of untreated nonwords and real words containing age-appropriate treated sounds and real words containing age-appropriate untreated sounds. The number of errors for all three sound sets declined. Sound distortion was the most frequent error type.</div><div><b>Conclusions:</b> Preliminary evidence suggests potentially positive treatment effects. However, rising baseline scores limit causal inference. Replication with more children of different ages is necessary.</div><div><br></div><div><b>Supplemental Material S1.</b> Overview of a speech motor learning (SML) program for an individual. </div><div><br></div><div><b>Supplemental Material S2. </b>Analysis of the participant's phonetic repertoire.</div><div><br></div><div><b>Supplemental Material S3.</b> Examples of treatment stimuli implemented in the current study.</div><div><br></div><div>van der Merwe, A., & Steyn, M. (2018). Model-driven treatment of childhood apraxia of speech: Positive effects of the speech motor learning approach. <i>American Journal of Speech-Language Pathology</i>. Advance online publication.</div>