The dataset includes information about gaming activity, potential gaming, Internet and SNS addiction, collected among a large sample of Polish adolescents. The study was a part of the project named: "Internet Gaming Disorder - the characteristics and prevalence of the phenomenon and its psychological correlates among primary and lower secondary school students in the Kuyavian-Pomeranian and Warmian-Masurian voivodships" - a public task co-financed by the Gambling Problem Solving Fund at the disposal of the Minister of Health (Poland), grant number 165/HBK/2018. Data were collected in 2018 in two voivodships: kujawsko-pomorskie (Kuyavian-Pomeranian) and warmińsko-mazurskie (Warmian-Masurian). The selection of educational institutions (primary and lower secondary schools) was random. The study was conducted in 10 locations (urban and rural). The sample consists of 1500 students aged 10-18 years. Headmaster of the particular school gave the consent for the study. The students during school time (usually at educational lesson) were informed about the purpose of the study, that it is anonymous and participation is voluntary, and that they may refuse or resign from it at any time. Dataset contains sociodemographic variables. The following measures were used: (i) Gaming activity questions (playing or not playing; types of games played - online, offline; with who the participant play games; devices used for gaming, frequency, emotions related to gaming, parents control and interest in children gaming, parents gaming activity); (ii) The Internet Gaming Disorder Scale-Short Form (IGD9-SF; Pontes & Griffiths, 2015); (iii) Ten-Item Internet Gaming Disorder Test (IGDT-10; Király, Sleczka, et al., 2017); (iv) Internet Addiction Test (IAT; Young 1998),(v) The Scale of Excessive Use of Social Networking Sites (Kotyśko, Michalak, in press). Measures of Internet Gaming Disorder (IGDS9-SF and IGDT-10) were randomly distributed to participants (one half of the measure sets included IGDS9-SF and other half the IGDT-10 - however all of the sets were mixed to improve the randomisation). The rest of the measures were used among all participants.
