Ng Kaylor Yee Man, To Carol Kit Sum, McLeod Sharynne
Division of Speech and Hearing Sciences, The University of Hong Kong , Sai Ying Pun , Hong Kong and.
Clin Linguist Phon. 2014 May;28(5):316-28. doi: 10.3109/02699206.2013.865789. Epub 2014 Jan 23.
The Intelligibility in Context Scale (ICS) is a parent report questionnaire for assessing children's speech intelligibility. The original version was developed in English and was based on Environmental Factors identified within the International Classification of Functioning, Disability and Health-Children and Youth Version (ICF-CY). The ICS has been translated into over 30 languages, including Traditional Chinese (ICS-TC). The aims of the current study were to examine the psychometric properties of the ICS-TC with Cantonese-speaking parent--child dyads and to identify speech measures that were more sensitive to the ICS-TC ratings. A total of 72 Cantonese-speaking preschoolers with (n = 39) and without speech sound disorders (SSD; n = 33) were recruited. Native Cantonese-speaking parents completed the ICS-TC independently. The measure showed good internal consistency and test-retest reliability. Correlations with speech performance on the Hong Kong Cantonese Articulation Test (HKCAT), and significant difference in ICS-TC mean scores between the two groups provided preliminary support for the validity of ICS-TC and suggested that ICS-TC can differentiate between children with and without SSD with a large effect size of d = 0.74. The optimal cutoff was estimated using Receiver Operative Characteristic (ROC) curve analysis, giving a sensitivity of 0.70 and specificity of 0.59. ICS-TC mean scores showed a positive correlation with the percentage of initial consonants correct and negative correlation with frequency of atypical errors, and both were moderate in strength. Given the satisfactory psychometric properties of ICS-TC, it may be a valuable clinical tool for screening Cantonese-speaking preschool children's intelligibility.
语境可懂度量表（ICS）是一份用于评估儿童言语可懂度的家长报告问卷。其原始版本以英文编制，基于《国际功能、残疾和健康分类——儿童和青年版》（ICF-CY）中确定的环境因素。ICS已被翻译成30多种语言，包括繁体中文（ICS-TC）。本研究的目的是检验ICS-TC在说粤语的亲子二元组中的心理测量特性，并确定对ICS-TC评分更敏感的言语指标。共招募了72名说粤语的学龄前儿童，其中39名有语音障碍（SSD），33名无语音障碍。以粤语为母语的家长独立完成ICS-TC。该量表显示出良好的内部一致性和重测信度。与香港粤语发音测试（HKCAT）的言语表现的相关性，以及两组之间ICS-TC平均分数的显著差异，为ICS-TC的有效性提供了初步支持，并表明ICS-TC能够区分有无SSD的儿童，效应量d = 0.74。使用受试者工作特征（ROC）曲线分析估计最佳临界值，灵敏度为·0.70，特异度为0.59。ICS-TC平均分数与初始辅音正确百分比呈正相关，与非典型错误频率呈负相关，且两者强度均为中等。鉴于ICS-TC具有令人满意的心理测量特性，它可能是筛查说粤语学龄前儿童可懂度的一种有价值的临床工具。
