Norozi Mojtaba, Mire Sarah S, Dadgar Hooshang, Dalvand Hamid, Marufizadeh Saman
Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Department of Educational Psychology, School of Education, Baylor University, TX, USA.
Int J Dev Disabil. 2023 Dec 6;71(4):554-568. doi: 10.1080/20473869.2023.2272089. eCollection 2025.
The Revised Illness Perception Questionnaire (IPQ-R) has been adapted for the study of autism spectrum disorder (ASD), but its use has not been studied in Iran. In this study, we evaluated the psychometric properties of the Revised Illness Perception Questionnaire for Autism Spectrum Disorder (IPQ-R-ASD-Persian) and how Iranian parents' perceptions of autism may be related to parental anxiety, depression, and affect.
This study included 114 parents of children with ASD in Iran. A sociodemographic questionnaire, the IPQ-R-ASD-Persian, Generalized Anxiety Disorder-7, Patient Health Questionnaire-9, and Positive and Negative Affect Schedule were administered. Confirmatory factor analysis and the maximum likelihood method based on the variance-covariance matrix were employed to explore the IPQ-R-ASD factor structure. Four measures of goodness-of-fit were utilized, which included chi-square/degree of freedom (χ2/df), comparative fit index (CFI), root mean square error of approximation (RMSEA), and standardized root mean square residual (SRMR). Cronbach's alpha and the corrected item-total correlation were used to measure internal consistency. The convergent validity was assessed by calculating the average variance extracted. Furthermore, we evaluated the test-retest reliability of the IPQ-R-ASD-Persian scales over two weeks using intra-class correlation coefficient (ICC).
There was no floor or ceiling effect for the IPQ-R-ASD-Persian scales. Cronbach's α values were consistently higher than 0.70, except for Timeline-Cyclical (α = 0.484). All scales of the IPQ-R-ASD-Persian except for the Timeline-Cyclical scale generally showed good test-retest reliability over two weeks. Confirmatory factor analysis indicated a seven-factor model (χ/df = 1.62, CFI = 0.92, RMSEA = 0.064, SRMR = 0.098), similarly to the original IPQ-R instrument.
The IPQ-R-ASD-Persian demonstrated statistically acceptable reliability and validity levels supporting its use as a viable instrument for such research in Iran. As a result, this might be a useful approach for evaluating parents' perceptions which is vital for supporting families and for developing effective interventions.
修订后的疾病认知问卷（IPQ-R）已被应用于自闭症谱系障碍（ASD）的研究，但在伊朗尚未对其使用情况进行研究。在本研究中，我们评估了修订后的自闭症谱系障碍疾病认知问卷（IPQ-R-ASD-波斯语版）的心理测量特性，以及伊朗父母对自闭症的认知与父母焦虑、抑郁和情感之间的关系。
本研究纳入了114名伊朗自闭症谱系障碍儿童的父母。发放了一份社会人口学问卷、IPQ-R-ASD-波斯语版问卷、广泛性焦虑障碍量表-7、患者健康问卷-9以及正负性情绪量表。采用验证性因素分析和基于方差协方差矩阵的最大似然法来探索IPQ-R-ASD的因素结构。使用了四项拟合优度指标，包括卡方/自由度（χ2/df）、比较拟合指数（CFI）、近似均方根误差（RMSEA）和标准化均方根残差（SRMR）。采用Cronbach's α系数和校正后的项目-总分相关系数来测量内部一致性。通过计算提取的平均方差来评估收敛效度。此外，我们使用组内相关系数（ICC）评估了IPQ-R-ASD-波斯语版量表在两周内的重测信度。
IPQ-R-ASD-波斯语版量表不存在地板效应或天花板效应。除时间线-周期性量表（α = 0.484）外，Cronbach's α值始终高于0.70。IPQ-R-ASD-波斯语版量表中除时间线-周期性量表外，其他量表在两周内总体显示出良好的重测信度。验证性因素分析表明该量表具有七因素模型（χ/df = 1.62，CFI = 0.92，RMSEA = 0.064，SRMR = 0.098），与原始的IPQ-R工具类似。
IPQ-R-ASD-波斯语版量表在统计学上显示出可接受的信度和效度水平，支持其在伊朗作为此类研究的可行工具使用。因此，这可能是评估父母认知的一种有用方法，这对于支持家庭和制定有效的干预措施至关重要。
