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Speech Motor ControlNew developments in basic and applied research$
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Ben Maassen and Pascal van Lieshout

Print publication date: 2010

Print ISBN-13: 9780199235797

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780199235797.001.0001

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Speech motor variability in people who stutter

Speech motor variability in people who stutter

Chapter:
(p.191) Chapter 11 Speech motor variability in people who stutter
Source:
Speech Motor Control
Author(s):

Pascal van Lieshout

Aravind K. Namasivayam

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199235797.003.0011

Variability in oral motor control has been an important topic in the literature for many years. The typical view is that motor output can be interpreted as a mixture of an invariant control signal (e.g., motor command) contaminated by a degree of random variation or neuromotor noise. This variation is supposed to originate somewhere along the pathway from the central nervous system where the command was generated to the peripheral structures responsible for its execution. This chapter explores different concepts on variability in speech production in more detail using examples of speech kinematic data from people who stutter and normal speaking individuals. The data indicate that popular indices of variability when applied to the same dataset are at odds with each other in terms of identifying specific trends for an individual or groups of individuals. Beyond these data examples, the chapter presents a new approach (for speech) to confront the challenging question if (and how) it is possible to identify the nature of movement variability and its potential relevance for speech motor control.

Keywords:   speech motor control, speech production, stuttering, movement variability, oral motor control, speech kinematic data

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