Abstract
Despite a considerable amount of research on intervention approaches for CAS (childhood apraxia of speech), little work has been done on the effectiveness of motor learning theory based treatment for adolescents with CAS. This study investigates the effect of a motor learning theory based treatment approach on an adolescent with CAS whose severity ranged from mild to moderate. A multiple baseline design across behaviors (target words and sentences) was used in this study. Three sets (20 words for Group 1 and 10 sentences each for Groups 2 and 3) of target stimuli were created (based on high functionality) by the participant and his primary caregiver. The subject was instructed to produce the target word or sentences five times with a 4-second pause between each attempt. Knowledge of results (KR) feedback was given after 5 attempts regarding his performance. The subject repeated each target stimulus 25 times and received 20 % feedback between each trial 5 times. The results showed that the mean scores of speech intelligibility increased during the sessions for target words and sentences and this effect was substantially transferred to untrained target words and sentences.
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