Auditory-perceptual evaluation with visual analogue scale: feasibility and preliminary evidence of ultrasound visual feedback treatment of Finnish [r]
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Date
2023
Authors
Aakko, Iida
Kauramäki, Jaakko
Cleland, Joanne
Lee, Alice
Vainio, Martti
Saalasti, Satu
Journal Title
Journal ISSN
Volume Title
Publisher
Informa Healthcare
Published Version
Abstract
Accumulating evidence suggests that ultrasound visual feedback increases the treatment efficacy for persistent speech sound errors. However, the available evidence is mostly from English. This is a feasibility study of ultrasound visual feedback for treating distortion of Finnish [r]. We developed a web-based application for auditory-perceptual judgement. We investigated the impact of listener’s experience on perceptual judgement and the intra-rater reliability of listeners. Four boys (10–11 years) with distortion of [r], otherwise typical development, partook in eight ultrasound treatment sessions. In total, 117 [r] samples collected at pre- and post-intervention were judged with visual analogue scale (VAS) by two listener groups: five speech and language therapists (SLTs) and six SLT students. We constructed a linear mixed-effects model with fixed effects for time and listener group and several random effects. Our findings indicate that measurement time had a significant main effect on judgement results, χ2 = 78.82, p < 0.001. Effect of listener group was non-significant, but a significant main effect of interaction of group × time, χ2 = 6.33, p < 0.012 was observed. We further explored the effect of group with nested models, and results revealed a non-significant effect of group. The average intra-rater correlation of the 11 listeners was 0.83 for the pre-intervention samples and 0.92 for post-intervention showing a good or excellent degree of agreement. Finnish [r] sound can be evaluated with VAS and ultrasound visual feedback is a feasible and promising method in treatment for distortion of [r], and its efficacy should be further assessed.
Description
Keywords
Distortion of [r] , Intervention , Perceptual judgement , Speech sound error , Ultrasound
Citation
Aakko, I, Kauramäki, J, Cleland, J, Lee, A, Vainio, M & Saalasti, S 2023, 'Auditory-perceptual evaluation with visual analogue scale : feasibility and preliminary evidence of ultrasound visual feedback treatment of Finnish [r]', Clinical Linguistics and Phonetics, vol. 37, no. 4-6, pp. 345-362. https://doi.org/10.1080/02699206.2022.2118079