Gaming Disorder Test - Czech validation data

In 2019, Gaming Disorder (GD) was acknowledged as an official diagnosis by the World Health
Organization. The Gaming Disorder Test (GDT) is the most widely used tool to measure GD; however,
due to its novelty, various measurement properties are still unexplored, and the number of validated
language variants is still limited. The present study is the first to assess the psychometric properties
of the Czech version of the GDT. Further, it focuses on its temporal prevalence and stability, gaming
genre invariance, and criterion validity. A large-scale sample of adult Czech gamers collected at two
points within nine months was analysed – T1 N = 5356; T2 N = 6077; longitudinal sample N = 1430.
Confirmatory factor analysis (CFA), structural equation modelling (SEM), and multigroup CFA were
employed to assess the measurement invariance. The study confirmed the one-factor structure of
the GDT and showed that it is invariant across preferred gaming genres and the time of data
collection. It showed a negative relationship with life satisfaction and a positive relationship with
anxiety, even when controlling for their mutual relationships. The prevalence in the longitudinal
sample was equal to or below 1.9% in each wave, but only 0.5% in the longitudinal sample (hence
n = 7 participants fulfilled in both waves the criteria for GD). The study suggests that the Czech
version of the GDT has good psychometric properties, including temporal stability and invariance
across gaming genres, so it is suitable for the survey type and epidemiological investigation of the
ICD-11´s Gaming Disorder.