Changes in Articulator Movement Variability During Phonemic Development: A Longitudinal Study.
Purpose: The present study explored articulator movement variability during voicing contrast acquisition. The purpose was to examine whether oral articulator movement trajectories associated with the production of voiced/voiceless bilabial phonemes in children became less variable over time. Method:...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 52; no. 1; pp. 164 - 178 |
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| Formato: | Artículo |
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American Speech-Language-Hearing Association
February 2009
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=508041930&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 508041930 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: February 2009 vid: 52 iid: 1 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 508041930 10.1044/1092-4388(2008/07-0220) ppf: 164 ppct: 14 formats: fmt: – @attributes: type: T – @attributes: type: P size: 630KB tig: atl: Changes in Articulator Movement Variability During Phonemic Development: A Longitudinal Study. aug: au: Grigos, Maria I. su: Physiological aspects of speech Human voice Physiology sug: subj: Physiological aspects of speech Human voice Physiology ab: Purpose: The present study explored articulator movement variability during voicing contrast acquisition. The purpose was to examine whether oral articulator movement trajectories associated with the production of voiced/voiceless bilabial phonemes in children became less variable over time. Method: Jaw, lower lip, and upper lip movements were recorded longitudinally in six, 19 month-old children as they began producing the voiceless phoneme /p/. Displacement signals were time and amplitude normalized. The spatiotemporal index (A. Smith, L. Goffman, H. Zelaznik, S. Ying, & C. McGillem, 1995) was computed to examine the variability in movement trajectories across repeated productions of target utterances. Results: Spatiotemporal variability of lip and jaw movements significantly decreased as children began producing the voiceless phoneme /p/. A significant negative correlation between the STI and the length of voice onset time (VOT) was also found in the voiceless productions in 4 of the 6 participants. Conclusions: Oral articulator movement variability is reduced in children across the stabilization of voicing contrast acquisition. Further, the relationship between VOT contrast production and movement variability suggests that a coordinate system between the oral and laryngeal articulators may be refined as children acquire the voicing contrast. Reprinted by permission of the publisher. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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