Abstract
In recent years, research on Gaming Disorder (GD) has grown substantially with researchers developing different psychometric tools for assessing disordered gaming. Two of the most prominent tools are the Internet Gaming Disorder Scale–Short-Form (IGDS9-SF) and the Gaming Disorder Test (GDT), which assess disordered gaming under the American Psychiatric Association (APA) and the World Health Organisation (WHO) frameworks respectively. The main aim of this study was to assess and compare the scalability, reliability, and validity of both scales to determine if the tools effectively assess GD in a normative sample, through the Mokken Scale Analysis (MSA). A sample of 605 participants (42.31 % female, meanage = 23.98 years, SD = 9.21 years) was recruited for the present study. Results showed that both the IGDS9-SF and GDT were unidimensional, with all items presenting latent monotonicity fitting in the Monotone Homogeneity Model (MHM). Item characteristic curves did not intersect and presented with adequate fit in the Double Monotonicity Model (DMM). These findings further support the psychometric adequacy of the IGDS9-SF and GDT, attesting to their suitability to assess disordered gaming.
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