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    Item response theory analysis of the recoded Internet Gaming Disorder Scale-Short-Form (IGDS9-SF)

    Gomez, R. and Stavropoulos, V. and Beard, C. and Pontes, Halley (2019) Item response theory analysis of the recoded Internet Gaming Disorder Scale-Short-Form (IGDS9-SF). International Journal of Mental Health and Addiction 17 (4), pp. 859-879. ISSN 1557-1874.

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    Based on the nine criteria for Internet gaming disorder (IGD) in DSM-5, the Internet Gaming Disorder Scale 9-Short Form (IGDS9-SF; Pontes and Griffiths 2015) is the most widely used questionnaire for assessing IGD. The present study examined support for the unidimensional factor structure of the instrument, with a group of 868 adolescent and adult gamers from the USA, with criteria recoded as present or absent. The two-parameter logistic model (2PLM) was used to examine the item response theory properties of the criteria included in the measure. Confirmatory factor analysis supported the one-factor model. The 2PLM analysis indicated that all the criteria were strong discriminators of high and low latent IGD. Furthermore, the items measured more of the GAD dimension and with more precision from around +2 SD from the mean trait level. The implications of the findings for interpreting the IGDS9-SF scores for clinical practice are discussed.


    Item Type: Article
    School: Birkbeck Faculties and Schools > Faculty of Science > School of Psychological Sciences
    Depositing User: Administrator
    Date Deposited: 10 May 2021 09:52
    Last Modified: 07 Aug 2023 16:12


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