CASL
Permanent URI for this collectionhttps://eresearch.qmu.ac.uk/handle/20.500.12289/22
Browse
2 results
Search Results
Item Articulatory placement for /t/, /d/, /k/ and / / targets in school age children with speech disorders associated with cleft palate.(Taylor & Francis, 2004) Gibbon, Fiona; Ellis, Lucy; Crampin, LisaThis study used electropalatography (EPG) to identify place of articulation for lingual plosive targets /t/, /d/, /k/ and / / in the speech of 15 school age children with repaired cleft palate. Perceptual judgements indicated that all children had correct velar placement for /k/, / / targets, but /t/, /d/ targets were produced as errors involving palatalization or velar placement. An EPG classification scheme identified alveolar, palatal and velar placement. Articulations involving contact in alveolar and velar regions simultaneously were identified as alveolar velar double articulations (AVDAs). The classification revealed that AVDAs were relatively frequent, with 28% of alveolar and 12% of velar targets affected, and ten out of the 15 children produced one or more of these abnormal articulations. The majority of children had variable placements, with alveolar more variable than velar targets. The positive finding from the EPG data revealed that most children with perceptual errors for /t/, /d/ were able to make closure in the alveolar region during at least some of their attempts to articulate these targets. It is argued that appropriate analysis and interpretation of EPG data provide clinically relevant information about tongue placement in cleft palate speech.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.