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dc.rights.licenseCreative Commons Attribution 4.0 International License
dc.contributor.authorCleland, Joanneen
dc.contributor.authorScobbie, James M.en
dc.date.accessioned2020-10-20T10:05:33Z
dc.date.available2020-10-20T10:05:33Z
dc.date.issued2021-03-09
dc.identifierhttps://eresearch.qmu.ac.uk/bitstream/handle/20.500.12289/10750/10750.pdf
dc.identifier.citationCleland, J. & Scobbie, J. (2021) The dorsal differentiation of velar from alveolar stops in typically developing children and children with persistent velar fronting. Journal of Speech, Language, and Hearing Research, 64(6S), pp. 2347-2362.en
dc.identifier.issn1092-4388en
dc.identifier.issn1558-9102
dc.identifier.urihttps://doi.org/10.1044/2020_JSLHR-20-00373
dc.identifier.urihttps://eresearch.qmu.ac.uk/handle/20.500.12289/10750
dc.descriptionJames M Scobbie - ORCID: 0000-0003-4509-6782 https://orcid.org/0000-0003-4509-6782en
dc.descriptionReplaced AM with VoR 2021-03-12.
dc.description.abstractPurpose: This study has two key aims: Firstly to provide developmental articulatory norms for the alveolar–velar distinction in 30 English-speaking typically developing children. Secondly to illustrate the utility of the reported measures for classifying and quantifying the speech of children with a history of persistent velar fronting as they develop the contrast longitudinally. Method: This study involved secondary data analysis of the Ultrasuite corpus comprising ultrasound tongue imaging recordings of speech materials from 30 typical children and longitudinal data from five children with persistent velar fronting undergoing ultrasound visual biofeedback intervention. We present two new measures of coronal dorsal differentiation: KTMax and KT crescent area. These measures distinguish /k/ and /t/ by quantifying the magnitude of this distinction in absolute spatial terms (mm of linear dorsal difference). For the typical children, we report these measures in corner vowel contexts. We then compare these to dorsal productions by the children with speech disorders, before, during, and after intervention. Results: Both measures reliably distinguished /k/ and /t/ in typically developing children. There was an effect of vowel, with larger KTmax and KT crescent area in /a/ and /o/ vowel contexts than in an /i/ context. The children with persistent velar fronting showed KTmax values near zero before intervention, showing a complete merger between /k/ and /t/. During intervention they showed variable KTmax values. Post intervention they showed values within the range of typical children. Conclusions: This study provides articulatory norms derived from ultrasound tongue imaging for the dorsal differentiation in alveolar and velar stops in typically developing children. By applying these norms to children with persistent velar fronting as they acquire this contrast, we see that /k/ is acquired in an articulatorily gradient manner.en
dc.description.sponsorshipThis study was funded by grants from the Engineering and Physical Sciences Research Council (EP/I027696/1) and the Chief Scientist Office of Scotland (ETM-402).en
dc.description.urihttps://doi.org/10.1044/2020_JSLHR-20-00373en
dc.format.extent2347-2362
dc.language.isoenen
dc.publisherAmerican Speech-Language-Hearing Associationen
dc.relation.ispartofJournal of Speech, Language, and Hearing Researchen
dc.rightsCopyright © 2021 The Authors
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleThe dorsal differentiation of velar from alveolar stops in typically developing children and children with persistent velar frontingen
dc.typeArticleen
dcterms.accessRightspublic
dcterms.dateAccepted2020-10-16
dc.date.updated2021-03-12
dc.description.volume64
dc.description.ispublishedpub
rioxxterms.typeJournal Article/Reviewen
rioxxterms.publicationdate2021-03-09
refterms.dateFCD2020-10-20
refterms.depositExceptionpublishedGoldOAen
refterms.accessExceptionNAen
refterms.technicalExceptionNAen
refterms.panelUnspecifieden
qmu.authorScobbie, James M.en
qmu.centreCASLen
dc.description.statuspub
dc.description.number6S
refterms.versionVoRen
refterms.dateDeposit2020-10-20


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Creative Commons Attribution 4.0 International License
Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International License