نوع مقاله : مقاله پژوهشی
نویسندگان
1 دکتری روانشناسی تربیتی، مدرس دانشگاه فرهنگیان، پردیس ورامین، ورامین، ایران .
2 دانشیار گروه روانشناسی، واحد گرمسار، دانشگاه آزاد اسلامی، گرمسار، ایران .
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Introduction: The use of methods such as Structural Equation Modeling (SEM) or Item-Response Theory (IRT) for the operationalization of psychological constructs requires examining the assumption of "local independence" in the data. The purpose of this research was to evaluate the dimensionality and added value of the sub-domains of psychological scales using the bifactor confirmatory factor analysis model.
Method: This was a review study after introducing the bifactor confirmatory factor analysis model, from the statistical package BifactorIndicesCalculator in R software version 4/3/3 to evaluate the dimensionality and added value of sub-domains of psychological scales using data collected from 512 students of Islamic Azad University, Garmsar branch, in the academic year 2022-2023, who were selected by available sampling method and answered the questions of Yousefi's Good Life Scale.
Results: If the total explained common variance index is less than 0.60, the scale is multidimensional and if it is 0.90 or more, the scale is sufficiently unidimensional. If the two indicators of the total explained common variance index and the percentage of uncontaminated correlations are at least 0.70, then the scale is sufficiently unidimensional. If the total explained common variance index is at least 0.60, it is necessary to have two indices of the percentage of uncontaminated correlations and the hierarchical omega coefficient at least 0.70 so that the scale is sufficiently unidimensional.
Conclusion: According to the results of the study, researchers can use the bifactor confirmatory factor analysis model to evaluate the dimensionality and value of the subdomains of psychological scales.
کلیدواژهها [English]
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