Bourqui Marion, Pernon Michaela, Fougeron Cécile, Laganaro Marina
Faculty of Psychology and Educational Science, University of Geneva, Geneva, Switzerland.
Laboratoire de Phonétique et Phonologie, UMR, France.
Aphasiology. 2021 May 26;36(7):854-867. doi: 10.1080/02687038.2021.1914815. eCollection 2022.
Vocoid epenthesis within consonant clusters has been claimed to contribute to the diagnosis of apraxia of speech. In clinical practice, the clinicians often doubt about the correct production of clusters as the C-C transition may be minimally disrupted.
To demonstrate the value of acoustic analysis in clinical practice as a reliable complement to perceptive judgment.
METHODS & PROCEDURES: We compared the acoustic signature and the perceptive detection of vocoid epentheses in unvoiced consonant clusters within pseudo-words produced by 40 participants presenting different subtypes of motor speech disorders (including apraxia of speech (AoS) and dysarthria) and matched neurotypical controls.
OUTCOMES & RESULTS: The results indicate that vocoid epenthesis was acoustically visible in 3 out of 10 participants with AoS, and in one out of 30 participants with dysarthria. One-quarter of these vocoid epentheses was not detected via auditory perception by expert listeners (speech and language therapists) who also made false detections.
The current results indicate that vocoid epenthesis is not systematic at least in mild AoS. Moreover, an important proportion is misdetected by ear, even by expert clinicians, meaning that visualisation of the acoustic signal can be of precious help.
辅音群中的元音插入被认为有助于言语失用症的诊断。在临床实践中，由于辅音-辅音过渡可能受到轻微干扰，临床医生常常怀疑辅音群的正确发音。
证明声学分析在临床实践中作为感知判断可靠补充的价值。
我们比较了40名表现出不同类型运动性言语障碍（包括言语失用症（AoS）和构音障碍）的参与者以及匹配的神经典型对照组在伪词中清辅音群中元音插入的声学特征和感知检测情况。
结果表明，在10名患有言语失用症的参与者中有3名在声学上可观察到元音插入，在30名患有构音障碍的参与者中有1名在声学上可观察到元音插入。这些元音插入中有四分之一未被专业听众（言语和语言治疗师）通过听觉感知检测到，并且专业听众也有错误检测。
目前的结果表明，至少在轻度言语失用症中，元音插入并不具有系统性。此外，并即使是专业临床医生，通过听觉也会有很大比例的漏检，这意味着声学信号的可视化可能会有很大帮助。
