Gregory, Adele, Tabain, Marija, and Robb, Michael (2013) Duration of early vocalisations. In: Proceedings of the 14th Annual Conference of the International Speech Communication Association (1) pp. 1258-1262. From: INTERSPEECH 2013: 14th Annual Conference of the International Speech Communication Association, 25-29 August 2013, Lyon, France.

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Abstract

The duration of three infants' vocalisations were examined during a six-month longitudinal study. In contrast to most other infant research, this study included in its analysis all vocalisations including those deemed vegetative or those having nonmodal voice quality. All three infants produced vocalisations which decreased in duration in the initial months. However between the 3rd and 5th month a significant increase (p<0.001) in the duration of vocalisations was found (from mean 207ms to 431ms). When vocalisations were analysed using perceptual voice quality categories, all were found to have significant differences (p<0.05) in duration relative to modal voice. Nonmodal voice qualities showed initial decreases in duration before increasing in duration in later months. In contrast those vocalisations produced using modal voice showed a positive linear trend and had the greatest linear rate of change across the study. These findings highlight the importance of including a wide variety of infant vocalisations including those with nonmodal voice quality in infant linguistic developmental studies.

Item ID:	50224
Item Type:	Conference Item (Research - E1)
ISBN:	978-1-62993-443-3
Keywords:	duration; infant vocalisation; voice quality
Date Deposited:	18 Sep 2017 02:10
FoR Codes:	20 LANGUAGE, COMMUNICATION AND CULTURE > 2004 Linguistics > 200404 Laboratory Phonetics and Speech Science @ 100%
SEO Codes:	97 EXPANDING KNOWLEDGE > 970120 Expanding Knowledge in Language, Communication and Culture @ 100%
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