M€ annikk€ o, N., Ruotsalainen, H., Tolvanen, A. & K€ a€ ari€ ainen, M. (2019). Psychometric properties of the Internet Gaming Disorder Test (IGDT-10) and problematic gaming behavior among Finnish vocational school students. Scandinavian Journal of Psychology, 60, 252-260.This study was conducted to investigate the psychometric properties of the Finnish version of the Internet Gaming Disorder Test (IGDT-10), identify the proportion displaying problematic gaming behavior (PGB) among Finnish vocational school students, and characterize the relationships between sociodemographic factors and gaming characteristics predicting PGB in this population. This cross-sectional study involving 773 students (mean age 17.5 years). Socio-demographic and gaming behavior characteristics were established using a web-based survey. A confirmatory factor analysis (CFA) showed that the IGDT-10 test has appropriate psychometric properties. The proportion of students exhibiting PGB based on the DSM-5 cut-off threshold was 1.3%. Regression analysis showed that male gender, preference for gaming on a personal computer, gaming time, poor self-perceived health status, and a preference for the solo and multiplayer online battle arenas (MOBA) game genres related positively to PGB scores. These findings demonstrate the appropriateness of the IGDT-10 test for the assessment of problematic gaming among adults, and support further research on PGB in Finland.Notes: a A significant difference v (4) = 63.16, p < 0.001; b A significant difference in gaming time males versus females, t (705) = -8.734, p < 0.0.001. Sample sizes for these analyses varied from 709 to 773 due to cases with missing values.