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Permanent URI for this collectionhttps://eresearch.qmu.ac.uk/handle/20.500.12289/22
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Item The dynamics of voiceless sibilant fricative production in children between 7 and 13 years old: An ultrasound and acoustic study(Acoustical Society of America (ASA), 2018-09-19) Zharkova, Natalia; Hardcastle, William J.; Gibbon, Fiona E.This study reports on dynamic tongue shape and spectral characteristics of sibilant fricatives /s/ and /ʃ/ in Scottish English speaking children aged between 7 and 13 years old. The sequences /əCa/ and /əCi/ were produced by 40 children, with ten participants in each age group, and two-year intervals between successive groups. Productions of the same sequences by ten adults were used for comparison with the children's data. Quantitative dynamic analyses were carried out on spectral information and on ultrasound imaging data on tongue shape. All age groups differentiated between the two consonants in the fricative centroid and in tongue shape. Vowel-on-consonant effects showed consonant-specific patterns across age groups without a consistent increase or decrease in the extent of coarticulation with increasing age. The extent of discriminability between the two fricatives increased with age on both acoustic and articulatory measures. Younger speakers were generally more variable than older speakers. Complementary findings from the centroid and tongue shape measures suggest that age-related differences are due to the ongoing maturation of controlling the tongue in coordination with other articulators, particularly the jaw, throughout childhood.Item Widening access to electropalatography for children with persistent sound system disorders.(American Speech-Language-Hearing Association, 1999-11) Gibbon, Fiona; Stewart, Fiona; Hardcastle, William J.Previous studies have demonstrated the value of using electropalatography (EPG) to assess, diagnose, and treat persistent sound system disorders in children. However, the application of EPG research has been limited in clinical contexts because most speech-language pathologists do not have access to the technique. This article provides an overview of recent EPG research on persistent sound system disorders and describes a network that has been established to widen access to EPG. The use of EPG via the network is illustrated in the case description of an 8-year-old boy, Robbie, who presented with a persisting speech disorder. The network was used because the clinician treating Robbie did not have an EPG. The main perceptual feature of Robbie's speech before EPG treatment was the deviant phonological process of backing /t/ and /d/ targets to velar place of articulation. EPG was used to assess articulatory patterns before treatment, to provide visual feedback as part of a treatment program, and to record changes in tongue-palate contact patterns as treatment progressed. Robbie achieved normal /t/ and /d/ articulatory patterns after treatment and was subsequently discharged. Factors that could have contributed to the successful outcome in this case are discussed, and areas requiring further research are identified.Item CLEFTNET SCOTLAND: applications of new technology to the investigation and treatment of speech disorders associated with cleft palate within a Scottish context.(Wiley, 1999) Nairn, M.; Hardcastle, William J.; Gibbon, Fiona; Razzell, R.; Crampin, L.; Harvey, l.; Reynolds, B.Item The application of electropalatography (EPG) to the remediation of speech disorders in school-aged children and young adults(Wiley-Blackwell, 1995-04) Dent, Hilary; Gibbon, Fiona; Hardcastle, William J.Item Electropalatography and its clinical applications.(Singular Publishing Group, 1997, 1997) Hardcastle, William J.; Gibbon, FionaItem Cross-linguistic study of lateral misarticulation using electropalatography(1995-04) Suzuki, N.; Wakumoto, M.; Michi, K.; Dent, Hilary; Gibbon, Fiona; Hardcastle, William J.Item A study of obstruent sounds in school-age children with speech disorders using electropalatography(1995-04) Gibbon, Fiona; Hardcastle, William J.; Dent, HilaryItem EPG in the Description of Normal and Disordered Speech Production Electropalatographic and perceptual analysis of the speech of Cantonese children with cleft palate(1995-04) Whitehill, Tara L.; Stokes, Stephanie F.; Hardcastle, William J.; Gibbon, FionaItem New developments in EPG3 Software(Wiley-Blackwell, 1995-04) Jones, Wilf; Hardcastle, William J.Item Covert contrast as a stage in the acquisition of phonetics and phonology.(Cambridge University Press, 2000-07) Scobbie, James M.; Gibbon, Fiona; Hardcastle, William J.; Fletcher, Paul; Broe, Michael; Pierrehumbert, JanetHow do children acquire the phonetic and phonological systems of their language, and in what ways may these parallel developments go awry?
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