Shoahosseini Roya, Baghaei Purya
English Department, Islamic Azad University, Mashhad Branch, Mashhad 9187147578, Iran.
Eur J Investig Health Psychol Educ. 2019 Aug 2;10(1):59-69. doi: 10.3390/ejihpe10010006.
In this study, we examine the psychometric properties of the Persian translation of the Children's Test Anxiety Scale (CTAS) using the Rasch rating scale model. In the first step, rating scale diagnostics revealed that the thresholds were disordered. To remedy this problem, two categories were collapsed and a rating scale structure with three points turned out to have optimal properties. Principal component analysis (PCA) of standardized residuals showed that the scale is not unidimensional. Since the scale is designed to measure three distinct dimensions of test anxiety we fitted a correlated three-dimensional Rasch model. A likelihood ratio test showed that the three-dimensional model fits significantly better than a unidimensional model. Principal component analysis of standardized residuals indicated that three subscales are unidimensional. Infit and outfit statistics indicated that one item misfitted the model in all the analyses. Medium correlations between the dimensions was evidence of the distinctness of the subscales and justifiability of the multidimensional structure for the scale. Criterion-related evidence was provided by correlating the scale with the Spence Children's Anxiety Scale (SCAS). The patterns of correlations provided evidence of convergent-discriminant validity. Findings suggest that a three-dimensional instrument with a 3-point Likert scale works best in the Persian language.
在本研究中，我们使用拉施评分量表模型检验了儿童考试焦虑量表（CTAS）波斯语翻译版的心理测量特性。第一步，评分量表诊断显示阈值无序。为解决此问题，合并了两个类别，结果发现具有三个点的评分量表结构具有最佳特性。标准化残差的主成分分析（PCA）表明该量表并非单维的。由于该量表旨在测量考试焦虑的三个不同维度，我们拟合了一个相关的三维拉施模型。似然比检验表明，三维模型的拟合度明显优于单维模型。标准化残差的主成分分析表明三个子量表是单维的。拟合度和 outfit 统计表明，在所有分析中都有一个项目与模型不拟合。维度之间的中等相关性证明了子量表的独特性以及该量表多维结构的合理性。通过将该量表与斯宾塞儿童焦虑量表（SCAS）相关联，提供了与标准相关的证据。相关性模式提供了聚合区分效度的证据。研究结果表明，具有 3 点李克特量表的三维工具在波斯语中效果最佳。
