Background and aims The nine-item Internet Gaming Disorder Scale - Short Form (IGDS-SF9) is brief and effective to evaluate Internet Gaming Disorder (IGD) severity. Although its scores show promising psychometric properties, less is known about whether different groups of gamers interpret the items similarly. This study aimed to verify the construct validity of the Persian IGDS-SF9 and examine ...

According to national and international assessment results, there is a serious problem regarding global reading comprehension. However, disagreement over the instruments used assess such skills. The goal of this study evaluate comprehension in third graders. With use Confirmatory Factor Analysis (CFA), an instrument 30 items three factors was confirmed: main ideas, inferences, contextualization...

Asparouhov and Muthén (2014) presented a new method for multiple-group confirmatory factor analysis (CFA), referred to as the alignment method. The alignment method can be used to estimate group-specific factor means and variances without requiring exact measurement invariance. A strength of the method is the ability to conveniently estimate models for many groups, such as with comparisons of c...

Introduction: This study aimed to standardize, stabilize, and validate the optimism questionnaire based on the theory of planned behavior in the first-grade high school male adolescents. Materials and Methods: The present descriptive study was conducted on 170 male students in the first grade of high school. The study data were collected using a questionnaire. In order to determine the reliabil...

This tutorial begins with an overview of structural equation modeling (SEM) that includes the purpose and goals of the statistical analysis as well as terminology unique to this technique. I will focus on confirmatory factor analysis (CFA), a special type of SEM. After a general introduction, CFA is differentiated from exploratory factor analysis (EFA), and the advantages of CFA techniques are ...

This tutorial begins with an overview of structural equation modeling (SEM) that includes the purpose and goals of the statistical analysis as well as terminology unique to this technique. I will focus on confirmatory factor analysis (CFA), a special type of SEM. After a general introduction, CFA is differentiated from exploratory factor analysis (EFA), and the advantages of CFA techniques are ...

Background: Teaching is one of the most stressful jobs. This research aims to evaluate the validity of the scale for measuring occupational stress among Iranian teachers. Materials and Methods:  This cross-sectional survey was conducted from December 2020 to January 2021 using a quantitative approach and the psychometric validation research method. The research sample consisted of specialists ...