CASL

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The impact of real-time articulatory information on phonetic transcription: Ultrasound-aided transcription in cleft lip and palate speech
(Karger, 2019-05-24) Cleland, Joanne; Lloyd, Susan; Campbell, Linsay; Crampin, Lisa; Palo, Pertti; Sugden, Eleanor; Wrench, Alan A.; Zharkova, Natalia
Objective: This study investigated whether adding an additional modality, namely ultrasound tongue imaging, to perception-based phonetic transcription impacted on the identification of compensatory articulations and on interrater reliability. Patients and Methods: Thirty-nine English-speaking children aged 3 to 12 with cleft lip and palate (CLP) were recorded producing repetitions of /aCa/ for all places of articulation with simultaneous audio and probe-stabilised ultrasound. Three types of transcriptions were performed: 1. Descriptive observations from the live ultrasound by the clinician recording the data; 2. Ultrasound-aided transcription by two ultrasound-trained clinicians; and 3. Traditional phonetic transcription by two CLP specialists from audio recording. We compared the number of consonants identified as in error by each transcriber and then classified errors into eight different subcategories. Results: Both the ultrasound-aided and traditional transcriptions yielded similar error-detection rates, however these were significantly higher than the observations recorded live in the clinic. Interrater reliability for the ultrasound transcribers was substantial (k=0.65), compared to moderate (k=0.47) for the traditional transcribers. Ultrasound-aided transcribers were more likely to identify covert errors such as double articulations and retroflexion than the audio-only transcribers. Conclusion: Ultrasound-tongue imaging is a useful complement to traditional phonetic transcription for CLP speech.
Aspects of identifying prosodic impairment
(2009) Peppé, Sue JE
This paper concludes the scientific forum on Prosody in Speech-Language Pathology that comprises an introduction Crystal, 2009, a lead article Peppé, 2009 and 11 responses to the lead article. This concluding paper is in part a summary of aspects of prosody that were fleshed out in the responses to the lead article, and in part a reply to some of the points raised by contributors. The concluding paper refers to the differing approaches to the taxonomy of prosody; the more specific material on the neurological bases of prosody; the manifestation of prosodic disorder in specific language impairment and Williams Syndrome; the state of the art of prosodic intervention; and the suggestion for assessing visual prosody. More attention is given to the issues of assessment and transcription, which attracted some differences of opinion. Some general methodological issues of testing e.g., standardization, age-appropriateness, and modelling are considered, as well as the possibility of automated assessment and suggestions for testing the perception of lexical stress. Impressionistic transcription and the techniques of conversation analysis are considered for their ability to identify the role of prosody in conversation, more particularly its effectiveness in achieving successful turnchange and interaction in highly unintelligible speech. The usefulness of acoustic analysis with and without phonological transcription is discussed, as well as the goals of transcription and the purposes it serves in the characterization of atypical prosody. The paper concludes by suggesting that better specification of what constitutes typical prosody is required, and that more attention needs to be paid to rhythmical atypicality and the interaction of segmental with suprasegmental impairment.
Advances in EPG for treatment and research: an illustrative case study
(Taylor & Francis, 2004) Scobbie, James M.; Wood, Sara; Wrench, Alan A.
Electropalatography (EPG), a technique which reveals tongue-palate contact patterns over time, is a highly effective tool for speech research. We report here on recent developments by Articulate Instruments Ltd. These include hardware for Windows-based computers, backwardly compatible (with Reading EPG3) software systems for clinical intervention and laboratory-based analysis for EPG and acoustic data, and an enhanced clinical interface with client and file management tools. We focus here on a single case study of a child aged 10 years who had been diagnosed with an intractable speech disorder possibly resulting ultimately from a complete cleft of hard and soft palate. We illustrate how assessment, diagnosis and treatment of the intractable speech disorder are undertaken using this new generation of instrumental phonetic support. We also look forward to future developments in articulatory phonetics that will link EPG with ultrasound for research and clinical communities. Keywords: Electropalatography, ultrasound, speech disorders, perceptual analysis
Why is prosody in speech-language pathology so difficult?
(2009) Peppé, Sue JE
An important question for speech-language pathologists is how best to define and characterize atypical prosody, with the eventual aim of designing effective intervention for it. With a view to investigating why prosodic atypicality should be hard to define and what considerations a speech-language pathologist should keep in mind, this paper begins by setting out some established functions of prosody and the forms that convey them, and goes on to review the neurological bases of prosodic disorder and some of the conditions in which prosodic disorder is known to occur. Factors in the perception of prosodic disorder are discussed, including the relationship between prosody and other aspects of communication, to identify the problems of distinguishing between prosody and interacting factors. The relationship between phonological prosodic categories and disordered prosody is considered, i.e., the problems of assigning disordered prosody to these categories for clinicians. Current methods of assessment, transcription and approaches to treatment are briefly considered, and an evaluation is made of how much progress has been made towards answering the initial question.

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