Affiliation:
1. Department of Speech Pathology & Audiology University of Iowa Iowa City
2. Department of Speech Pathology & Audiology University of Iowa and National Center for Voice Iowa City
3. Department of Psychology University of California Los Angeles
Abstract
Although decreased accuracy and increased variability of movement is a common developmental finding, the nature of these performance patterns remains poorly understood. The present study examined the accuracy and stability of several aspects of oral motor control. Specifically, we examined the control of absolute timing (temporal parameterization), absolute amplitude (amplitude parameterization), and relative timing and amplitude (generalized motor programs) in children and adults during a lip plus jaw opening and closing task. As was the case with similar reports, we found that children were both less accurate and less stable in their assignment of temporal and amplitude parameters. However, we further found that although children's underlying movement patterns were less accurate than those of adults, children exhibited similar variability in their generalized motor programs. The results are discussed within the framework of a schema model of motor control (Schmidt, 1975) with reference to the strategic allocation of resources during motor learning (e.g., Clark & Robin, 1998).
Publisher
American Speech Language Hearing Association
Subject
Speech and Hearing,Linguistics and Language,Language and Linguistics
Cited by
24 articles.
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