In search of the optimum structural model for internet gaming disorder
- Authors: Stavropoulos, Vasileios , Gomez, Rapson , Griffiths, Mark
- Date: 2021
- Type: Text , Journal article
- Relation: BMC Psychiatry Vol. 21, no. 1 (2021), p.
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- Description: Background: Internet gaming Disorder (IGD) constitutes a recently proposed clinical disorder (American Psychiatric Association, Diagnostic and statistical manual of mental disorders, 2013). The present study examined if IGD is best conceptualized as categorical (present/absent), or dimensional (severity ranging from low to high), or both (i.e., hybrid of categorical/dimensional). Methods: Ratings of the nine DSM-5 IGD symptoms, as presented in the Internet Gaming Disorder Scale 9-Short Form (Pontes & Griffiths, Comput Hum Behav 45:137-143, 2015), from 738 gamers, aged 17 to 72 years, were collected. Confirmatory factor analysis (CFA), latent class analysis (LCA), and factor mixture modelling analysis (FMMA) procedures were applied to determine the optimum IGD model. Results: Although the findings showed most support for a FFMA model with two classes and one factor, there was also good statistical and substantive support for the one-factor CFA model, and the LCA model with three classes. Conclusion: It was concluded that while the optimum structure of IGD is most likely to be a hybrid model (i.e., concurrently categorical and dimensional), a uni-dimensional model and/or a three-class categorical model are also plausible. © 2021, The Author(s).
Unraveling the optimum latent structure of attention-deficit/hyperactivity disorder : evidence supporting ICD and HiTOP frameworks
- Authors: Gomez, Rapson , Liu, Lu , Krueger, Robert , Stavropoulos, Vasileios , Downs, Jenny
- Date: 2021
- Type: Text , Journal article
- Relation: Frontiers in Psychiatry Vol. 12, no. (2021), p.
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- Description: Attention Deficit/hyperactivity disorder (ADHD) is conceptualized differently in the Diagnostic and Statistical Manual (DSM-5), the International Classification of Diseases-10 (ICD-10), and the Hierarchical Taxonomy of Psychopathology (HiTOP) frameworks. This study applied independent cluster confirmatory factor analysis (ICM-CFA), exploratory structure equation model with target rotation (ESEM), and the S-1 bi-factor CFA approaches to evaluate seven ADHD models yielded by different combinations of these taxonomic frameworks. Parents and teachers of a community sample of children (between 6 and 12 years of age) completed the Disruptive Behavior Rating Scale (for ADHD symptoms) and the Strengths and Difficulties Questionnaire (for validation). Our findings for both parent and teacher ratings provided the most support for the S-1 bi-factor CFA model comprised of (i) a g-factor based on ICD-10 impulsivity symptoms as the reference indicators and (ii) inattention and hyperactivity as specific factors. However, the hyperactivity-specific factor lacked clarity and reliability. Thus, our findings indicate that ADHD is best viewed as a disorder primarily reflecting impulsivity, though with a separable inattention (but no hyperactivity) component, i.e., “ADID (attention deficit/impulsivity disorder).” This model aligns with the HiTOP proposals. © Copyright © 2021 Gomez, Liu, Krueger, Stavropoulos, Downs, Preece, Houghton and Chen.
Correlated trait–correlated method minus one analysis of the convergent and discriminant validity of the conners 3 short forms
- Authors: Gomez, Rapson , Vance, Alasdair , Stavropoulos, Vasileios
- Date: 2020
- Type: Text , Journal article
- Relation: Assessment Vol. 27, no. 7 (2020), p. 1463-1475
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- Description: This study used the correlated trait–correlated method minus one model to examine the convergent and discriminant validity of the scales of the Conners 3 Short [C 3 (S)]. The C 3 (S) scales in the analysis were inattention (IN), hyperactivity/impulsivity (HY), learning problems (LP; learning problems/executive functioning from the teacher version), aggression (AG), and peer relations (PR, only for parent and teacher versions). A total of 529 adolescents and children (75% males, mean age = 11.75 years, SD = 2.97 years) provided self-ratings, and were also rated by their mothers and teachers. The findings indicated no support for the convergence of IN and HY across the three respondents. In contrast, there was convergence for LP, AG, and PR. There was support for the discriminant validity of the traits, except between IN and HY. The findings are discussed in relation to the convergent and discriminant validity of the C 3 (S) measures, and the clinical use of the C 3 (S). © The Author(s) 2018.
Item response theory analysis of the recoded Internet Gaming Disorder Scale-Short-Form (IGDS9-SF)
- Authors: Gomez, Rapson , Stavropoulos, Vasileios , Beard, Charlotte , Pontes, Halley
- Date: 2019
- Type: Text , Journal article
- Relation: International Journal of Mental Health and Addiction Vol. 17, no. 4 (2019), p. 859-879
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- Description: 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.
Depression, Internet Gaming Disorder, and the moderating effect of the gamer-avatar relationship : An exploratory longitudinal study
- Authors: Burleigh, Tyrone , Stavropoulos, Vasileios , Liew, Lucas , Adams, Baxter , Griffiths, Mark
- Date: 2018
- Type: Text , Journal article
- Relation: International Journal of Mental Health and Addiction Vol. 16, no. 1 (2018), p. 102-124
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- Description: Research into Internet gaming disorder (IGD) literature largely uses cross-sectional designs and seldom examines gaming context-related factors. Therefore, the present study combined a cross-sectional and longitudinal design to examine depression and the gameravatar relationship (GAR) as risk factors in the development of IGD among emerging adults. IGD behaviors of 125 gamers (64 online gamers, Mage = 23.3 years, SD = 3.4; 61 offline gamers, Mage = 23.0 years, SD = 3.4) were assessed using the nine-item Internet Gaming Disorder Scale Short Form (IGDS-SF9; Pontes and Griffiths Revista Argentina de Ciencias del Comportamiento, 7, 102–118, 2015a; Computers in Human Behavior, 45, 137–143, 2015b). The Self-Presence Scale (Ratan and Dawson Communication Research, 2015) and the Beck Depression Inventory (Beck et al. 1996) were also used to assess gamers’ levels of GAR and depressive symptoms, respectively. Regression and moderation analyses revealed that depression and the GAR act as individual risk factors in the development of IGD over time. Furthermore, the GAR exacerbates the IGD risk effect of depression.
Measurement invariance of the Internet Gaming Disorder Scale-Short-Form (IGDS9-SF) between Australia, the USA, and the UK
- Authors: Stavropoulos, Vasileios , Beard, Charlotte , Griffiths, Mark , Buleigh, Tyrone , Gomez, Rapson , Pontes, Halley
- Date: 2018
- Type: Text , Journal article
- Relation: International Journal of Mental Health and Addiction Vol. 16, no. 2 (2018), p. 377-392
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- Description: The Internet Gaming Disorder Scale–Short-Form (IGDS9-SF) is widely used to assess Internet Gaming Disorder behaviors. Investigating cultural limitations and implications in its applicability is imperative. One way to evaluate the cross-cultural feasibility of the measure is through measurement invariance analysis. The present study used Multigroup Confirmatory Factor Analysis (MGCFA) to examine the IGDS9-SF measurement invariance across gamers from Australia, the United States of America (USA), and the United Kingdom (UK). To accomplish this, 171 Australian, 463 USA, and 281 UK gamers completed the IGDS9-SF. Although results supported the one-factor structure of the IGD construct, they indicated cross-country variations in the strength of the relationships between the indicators and their respective factor (i.e., non-invariant loadings of items 1, 2, 5), and that the same scores may not always indicate the same level of IGD severity across the three groups (i.e., non-invariant intercepts for items 1, 5, 7, 9).
A multilevel longitudinal study of obsessive compulsive symptoms in adolescence: Male gender and emotional stability as protective factors
- Authors: Stavropoulos, Vasileios , Moore, Kathleen , Lazaratou, Helen , Dikeos, Dimitris , Gomez, Rapson
- Date: 2017
- Type: Text , Journal article
- Relation: Annals of General Psychiatry Vol. 16, no. 42 (2017), p.1-12
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- Description: The severity of obsessive compulsive symptoms (OCS) is suggested to be normally distributed in the general population, and they appear to have an impact on a range of aspects of adolescent development. Importantly, there are individual differences regarding susceptibility to OCS. In the present repeated measures study, OCS were studied in relation to gender and emotional stability (as a personality trait) using a normative sample of 515 adolescents at ages 16 and 18 years. OCS were assessed with the relevant subscale of the SCL-90-R and emotional stability with the Five Factor Questionnaire. A three-level hierarchical linear model was calculated to longitudinally assess the over time variations of OCS and their over time links to gender and emotional stability, while controlling for random effects due to the nesting of the data. Experiencing OCS increased with age (between 16 and 18 years). Additionally, male gender and higher emotional stability were associated with lower OCS at 16 years and these remained stable over time. Results indicate age-related and between individual differences on reported OCS that need to be considered for prevention and intervention planning.