Adolescents' problematic internet and smartphone use in (cyber)bullying experiences: A network analysis.

Background: This study investigates both offline and online bullying perpetration and victimization in association with problematic internet use (PIU) and problematic smartphone use (PSU), while also considering the related psychosocial difficulties.

Methods: A total of 3939 adolescents (49.4% boys, aged 13-15 years) from a representative sample of schools in Slovakia was obtained from the Health Behavior in School-aged Children (HBSC) project in 2018.

Validation of the Social Media Disorder Scale using network analysis in a large representative sample of Czech adolescents.

Background: The importance of studying the excessive use of social media in adolescents is increasing and so is the need for in-depth evaluations of the psychometric properties of the measurement tools. This study investigated the properties of the Social Media Disorder Scale (SMDS) in a large representative sample of Czech adolescents.

Methods: We analyzed the representative sample of 13,377 Czech adolescents (50.

Eating disorders symptoms and excessive internet use in adolescents: the role of internalising and externalising problems.

Background: Both eating disorders and excessive internet use represent significant health issues for contemporary adolescents. Yet, the link between them has seldom been investigated. We aim to study this association through their common underlying psychological factors: internalising problems and externalising problems.

Social constraints associated with excessive internet use in adolescents: the role of family, school, peers, and neighbourhood.

Objectives: Excessive internet use (EIU) has been studied predominantly within the context of individual risk factors. Less attention has been paid to social factors, especially in a fashion complex enough to include the multiple domains of adolescent socialization. This study examined the relationship between EIU and constraints within family, school, peer groups, and neighbourhoods, while controlling for emotional and behavioural difficulties.