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Permanent URI for this collectionhttps://eresearch.qmu.ac.uk/handle/20.500.12289/22

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Author: search.filters.author.Gibbon, FionaSubject: search.filters.subject.Stops

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    Normal adult speakers' tongue palate contact patterns for alveolar oral and nasal stops
    (Taylor & Francis, 2007-03) Gibbon, Fiona; Yuen, Ivan; Lee, Alice; Adams, Lynne
    This study compared tongue palate contact patterns for oral stops (/t/, /d/) with those for the nasal stop /n/ in order to provide normative data for diagnosing and treating individuals with speech disorders. Electropalatographic (EPG) data were recorded from 15 English speaking adults for word initial /t/, /d/ and /n/ in a high and a low vowel context. EPG frames were classified according to three criteria: (1) anterior constriction; (2) bilateral constriction; and (3) zero posterior central contact. Total amount of contact and variability were also measured. The results showed that almost all (99%) stops met Criteria 1 and 3, with fewer articulations (88% of /t/; 83% of /d/ and 55% of /n/) meeting Criterion 2. Although all stops had similar spatial patterns, /t/ and /d/ had more contact and were more likely to have bilateral constriction than /n/. There were no differences in variability between /t/, /d/ and /n/, however. The clinical implications of the results for the management of individuals with speech disorders are discussed.
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    Articulatory characteristics of the occlusion phase of /t / compared to /t/ in adult speech
    (Taylor & Francis, 2007-03) Liker, Marko; Gibbon, Fiona; Wrench, Alan A.; Horga, Damir
    This study used electropalatography (EPG) to investigate articulatory characteristics of /t / and /t/ occlusion in order to provide normative data to be used for the diagnosis and treatment of individuals with speech disorders. EPG data from the EUR-ACCOR database were analysed for nonsense VCV sequences containing /t / and /t/ in nine vowel contexts for seven English speaking adults. The main results of this study are that all speakers had a significantly more posterior placement for /t / compared to /t/ and that placement was stable during the occlusion phase of both /t / and /t/. For most speakers, the occlusion phase was longer for /t / compared to /t/, the occlusion phase generally involved more EPG contact and was slightly more variable in /t / compared to /t/, but these differences were not statistically significant for all speakers. The implications of the results for diagnosing and treating speech disorders are discussed.