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Patterns of variability in voice onset time: a developmental study of motor speech skills in humans

Whiteside, S.P., Dobbin, R. and Henry, L. (2003) Patterns of variability in voice onset time: a developmental study of motor speech skills in humans. Neuroscience Letters, 347 (1). pp. 29-32. ISSN 0304-3940

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Abstract

This study investigated the developmental patterns of variability in the speech parameter voice onset time (VOT) in forty six children. Five groups of children participated in the study as follows: i) Group 1 - aged 5 years 8 months (n=6); ii) Group 2 - 7 years 10 months (n=10); iii) Group 3 - 9 years 10 months (n=10); iv) Group 4 - 11 years 10 months (n=10), and v) Group 5 - 13 years 2 months (n=10). Coefficient of variation (COV) values were examined for the VOT values of both "voiceless" (/p t k/) and "voiced" (/b d g/) plosives to determine patterns of variability. Significant effects of age were revealed for both the voiceless and voiced plosives, and levels of variability leveled off for Group 4. The data suggest that although variability in VOT decreases with age, the presence of residual variability may be a prerequisite for the further refinement of motor speech skills.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2003 Elsevier. This is an author produced version of a paper subsequently published in Neuroscience Letters.
Keywords: voice onset time, variability, speech development, motor speech skills, pre-adolescence, adolescence, phonetic context
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > Department of Human Communication Sciences (Sheffield)
Depositing User: Repository Officer
Date Deposited: 05 Feb 2007
Last Modified: 07 Jun 2014 02:11
Published Version: http://dx.doi.org/10.1016/S0304-3940(03)00598-6
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/S0304-3940(03)00598-6
URI: http://eprints.whiterose.ac.uk/id/eprint/1944

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