Tavakoli Mahdiye, Jalilevand Nahid, Bijankhan Mahmood, Torabinezhad Farhad, Mohamadi Reyhane, Latifi Noor Ahmad
Rehabilitation Research Center, Department of Speech Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Department of Linguistics, Faculty of Literature and Humanities, University of Tehran, Tehran, Iran.
Med J Islam Repub Iran. 2024 Oct 8;38:116. doi: 10.47176/mjiri.38.116. eCollection 2024.
Compensatory errors are a conventional part of an articulation disorder identified by speech pathologists in patients with Cleft palate (CP). This study aimed to evaluate the effect of new mixed articulation therapy on the perceptual and acoustic features of these errors.
The single-case experimental design, ABA design, was used in this study. Five CP young children ages 3.9 to 5.4 months, received online multimodal articulation therapy for 5 weeks, 6 sessions per week, utilizing both standard and maximum opposition approaches. Patients underwent baseline and follow-up sessions before and after treatment for 3 weeks-1 session per week. The percentage of compensatory errors was calculated as a perceptual measure, and 2 acoustic measures-including the slope of the locus equation (LE slope) and the overall F2 Transition Frequency Extent (TFE)-were analyzed.
Compensatory errors were eliminated in all 5 participants with the mixed articulation therapy (Percentage of nonoverlapping data [PND] ≥80%, percentage of Improvement Rate Difference [IRD] ≥73.33%), and this therapy effect was maintained for up to 3 weeks of follow-up. The acoustic measures showed a difference in the F2 changes during CV transition in compensatory error before and after therapy.
This study supports the hypothesis that online mixed articulation therapy in children with CP can eliminate compensatory errors. The results of this study can also help extend the knowledge about F2 changes during CV transition in compensatory error before and after speech therapy to create objective and visual diagnostic documentation for patients with CP and prediction of some coarticulation models.
代偿性错误是腭裂（CP）患者言语病理学家所识别的构音障碍的常规组成部分。本研究旨在评估新型混合构音疗法对这些错误的感知和声学特征的影响。
本研究采用单病例实验设计，即ABA设计。五名年龄在3.9至5.4岁的腭裂幼儿接受了为期5周的在线多模态构音疗法，每周6次，采用标准和最大对立方法。患者在治疗前和治疗后3周每周进行1次基线和随访评估。计算代偿性错误的百分比作为感知指标，并分析2项声学指标，包括轨迹方程斜率（LE斜率）和F2过渡频率范围（TFE）。
所有5名参与者通过混合构音疗法消除了代偿性错误（非重叠数据百分比[PND]≥80%，改善率差异百分比[IRD]≥73.33%），且这种治疗效果在长达3周的随访中得以维持。声学指标显示治疗前后代偿性错误中CV过渡期间F2变化存在差异。
本研究支持以下假设，即腭裂儿童的在线混合构音疗法可消除代偿性错误。本研究结果还有助于扩展关于言语治疗前后代偿性错误中CV过渡期间F2变化的知识，为腭裂患者创建客观、可视化的诊断记录，并预测一些协同发音模型。
