Adverse physiological and psychological effects of screen time on children and adolescents: Literature review and …

ADHD-related behavior was linked to sleep problems, overall screen time, and violent and fast-paced content which activates dopamine and the reward pathways. Early and prolonged exposure to violent content is also linked to risk for antisocial behavior and decreased prosocial behavior. Psychoneurological effects: addictive screen time use …

https://pubmed.ncbi.nlm.nih.gov/29499467/