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Permanent URI for this collectionhttps://eresearch.qmu.ac.uk/handle/20.500.12289/22
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Item Labial-Lingual Double Articulations in Speakers With Cleft Palate.(Allen Press, 2002-01) Gibbon, Fiona; Crampin, LisaObjective: Labial-lingual double articulations (LLDAs) are speech errors involving simultaneous valving at the lips and in the linguapalatal region. This study investigates the frequency of LLDAs occurring for /p/, /b/, and /m/ targets and describes the linguapalatal contact patterns involved in these abnormal articulations. Design: A retrospective study involving analysis of articulatory data from all speakers with cleft palate recorded at a research center over a 10-year period. Participants: Twenty-seven speakers aged 5 to 62 years (median 11 years) with compensatory speech errors associated with repaired cleft palate. Measures: The lingual component of LLDAs was identified using electropalatography (EPG). EPG data were recorded simultaneously with acoustic data. Fifteen bilabial targets (/p/, /b/, /m/) per participant were analyzed. LLDAs were identified in cases where complete linguapalatal constriction (as observed from EPG data) occurred throughout the closure phase of bilabial targets. The labial component of LLDAs was identified from clinical observations of the speakers made during productions of bilabial targets. Results: Three speakers (11%) frequently produced LLDAs for bilabial targets. The configuration of tongue-palate contacts involved in the lingual component of the LLDAs differed in each of the three speakers: one speaker had velar constriction, another had alveolar constriction, and the third had simultaneous alveolar-velar constriction. LLDAs did not similarly affect bilabial targets in the three speakers. One speaker produced LLDAs for /p/ and /b/ targets only. Another produced LLDAs for all /m/ targets but inconsistently for /p/ and /b/ targets. The third speaker produced LLDAs for all /b/ targets but inconsistently for /p/ and /m/ targets. Conclusion: LLDAs occurred in a minority of speakers investigated. Nevertheless, it is argued that it is important to identify LLDAs for clinical decision making and for research purposes. The results from this study add to current knowledge about abnormal articulations in cleft palate speech, but further research is needed into the precise timing of lip and tongue-palate closures and into the airflow and acoustic characteristics of LLDAs.Item An electropalatographic investigation of middorsum palatal stops in an adult with repaired cleft palate.(Allen Press Incorporated, 2001-03) Gibbon, Fiona; Crampin, LisaObjective: Middorsum palatal stops are compensatory articulations that occur relatively frequently in cleft palate speech. This study used electropalatographic (EPG) and acoustic data to investigate /t/ and /k/ targets produced as middorsum palatal stops ([c]) by an adult with an articulation disorder associated with a repaired cleft palate. Results: Two novel observations were made from the instrumental data. First, although /t/ and /k/ targets were judged by phonetically trained listeners as homophonous (i.e., both produced as [c]), the EPG data revealed that the place of articulation for the [c] produced for /t/ was more anterior than the place of articulation for the [c] produced for /k/. Second, production of palatal stops involved lateral release followed by a variable period of lateral friction. Measurements made from the instrumental data quantified the temporal extent of lateral friction during the aspiration period. Conclusions: These observations merit further systematic investigation in cleft palate speech, and the procedures reported in this study are considered appropriate for such future research.Item Visual feedback therapy using electropalatography (EPG) for articulation disorders associated with cleft palate.(Plural publishing., 2001) Gibbon, Fiona; Hardcastle, William J.; Crampin, Lisa; Reynolds, Beverly; Razzell, Roz; Wilson, JanThis study investigates the effects of visual feedback therapy using electropalatography (EPG) on abnormal /t/ and /s/ tongue–palate contact patterns in children and young adults with articulation disorders associated with repaired cleft palate. Twelve subjects were randomly assigned to one of two treatment regimes. Subjects in regime 1 received four sessions of individual therapy using EPG for visual feedback (‘EPG therapy’) followed by four sessions of therapy without EPG (‘non-EPG therapy’). Subjects in regime 2 had four sessions of non-EPG therapy followed by four sessions of EPG therapy. Analysis of tongue contact patterns showed that the majority (75%) of subjects had more normal articulatory patterns for /t/ and /or /s/ targets after EPG therapy. Non-EPG therapy had no apparent effect on articulatory patterns for most (92%) subjects. Three subjects (25%) failed to respond to either EPG or non-EPG therapy. The results indicate that EPG therapy has a positive effect on abnormal articulatory patterns in many, but not all, cleft palate speakers with articulation errors. The results also suggest that EPG therapy is more efficient than non- EPG therapy in changing articulatory patterns in subjects with cleft palate.Item Portable training for speech disorders(1998) Leitch, Elspeth; Gibbon, Fiona; Crampin, LisaElectropalatography contributes to speech assessment and diagnosis, is useful in measuring change, and provides clients with effective visual feedback therapy but is available in relatively few clinical centres. Its use has been limited by the capital cost of the equipment, a lack of technical support, and problems of accessibility to clients. This article describes the use of an innovative portable EPG unit in the treatment of a 10-year-old boy with persistent velar fronting to the alveolar place of articulation due to cerebellar ataxic dysarthria. Initial assessment and a week of intensive daily therapy took place in Glasgow, 140 miles from his home. Following the week of intensive therapy, and progress with velar placement, therapy was continued after a few months using the portable therapy unit in his home area on a daily basis for four months. EPG sequence patterns are illustrated along with a description of his progress with velar targets. The use of visual feedback is considered to have been an essential component in the successful outcome in this case.