Department of Biomedical and Clinical Science, "L. Sacco" Hospital, University of Milan, Milan, Italy,
Department of Psychology, University of Milan-Bicocca, Milan, Italy,
Folia Phoniatr Logop. 2021;73(4):265-276. doi: 10.1159/000506475. Epub 2020 Mar 13.
The Intelligibility in Context Scale (ICS) is a parent-report scale by which parents can rate their child's functional speech intelligibility according to seven different communicative partners. Translations, linguistic adaptations, and psychometric and norming data for ICS have been achieved in different languages.
To evaluate the psychometric properties of the Italian version of the ICS (ICS-I) in terms of internal consistency, test-retest reliability, criterion validity (correlation with speech measures), and construct validity, and to investigate potential differences between mothers' and fathers' subjective ratings in ICS-I.
Italian-speaking children aged 3.0-5.11 years (n = 364), without major developmental impairment, were recruited in kindergartens. All children were independently rated by their mothers (ICS-Im) and fathers (ICS-If). A subsample of parents (n = 127) rated ICS-I twice after 3 weeks (test-retest reliability). Children were administered a naming and a word repetition task, by which speech measures were calculated: percentage of phonemes correct (PPC), percentage of consonants correct (PCC), and percentage of vowels correct (PVC).
High internal consistency (α = 0.92) and good test-retest reliability (rs = 0.78) were found. A high (r > 0.67) correlation between the ICS-I total scores and single-item scores was found (construct validity), except for parental perception in ICS-Im and ICS-If. Moderate correlations (rs > 0.38) between the ICS-I and the PPC and PCC tasks suggested adequate criterion validity. Mothers' and fathers' ratings showed an appropriate agreement in the items acquaintances and teachers, but overall parent ratings were significantly different, with higher mean scores in ICS-Im (median = 4.57) than in ICS-If (median = 4.46), Z = -2.852, p < 0.01.
As for other previous international studies, ICS-I presents good psychometric properties, but some differences in mothers' and fathers' scores suggest a potential parental influence in rating a child's intelligibility. Findings support cross-linguistic research, and further investigation could promote the application of ICS-I as an outcome measure in children with speech sound disorders.
语境可懂度评估量表（ICS）是一种家长报告量表，家长可以根据七个不同的交流伙伴对孩子的功能性言语可懂度进行评分。ICS 已被翻译成多种语言，并进行了翻译、语言调整、心理测量和常模数据研究。
评估意大利语版 ICS（ICS-I）在内部一致性、重测信度、效标效度（与言语测量的相关性）和结构效度方面的心理测量特性，并探讨 ICS-I 中母亲和父亲主观评分之间的潜在差异。
在幼儿园招募了 3.0-5.11 岁（n=364）、无重大发育障碍的讲意大利语的儿童。所有儿童均由其母亲（ICS-Im）和父亲（ICS-If）独立进行评分。一部分家长（n=127）在 3 周后进行了两次 ICS-I 评分（重测信度）。对儿童进行命名和单词重复任务，通过这些任务计算言语测量值：音位正确百分比（PPC）、辅音正确百分比（PCC）和元音正确百分比（PVC）。
发现该量表具有较高的内部一致性（α=0.92）和良好的重测信度（rs=0.78）。ICS-I 总分和单项评分之间存在高度相关性（r>0.67）（结构效度），除了 ICS-Im 和 ICS-If 中父母感知的项目。ICS-I 与 PPC 和 PCC 任务之间存在适度相关性（rs>0.38），提示具有足够的效标效度。母亲和父亲在熟人及老师项目上的评分具有较好的一致性，但总体上父母评分存在显著差异，ICS-Im 的平均得分（中位数=4.57）高于 ICS-If（中位数=4.46），Z=-2.852，p<0.01。
与其他先前的国际研究一样，ICS-I 具有良好的心理测量特性，但母亲和父亲评分之间的差异表明，父母在评定孩子的可懂度方面可能存在潜在影响。研究结果支持跨语言研究，进一步的研究可以促进 ICS-I 作为言语障碍儿童的疗效评估指标的应用。
