A comprehensive review of decades of research on nearly three million children aged 18 and under from 64 countries finds that increased screen time is associated with poorer outcomes in learning, speech, emotional regulation, and behavior. Researcher Sheri Madigan emphasizes that while associations are small, they are meaningful given screens' universal presence in children's lives, and notes that newer studies show stronger correlations than older ones, possibly due to changes in technology use patterns. She recommends parents and governments work together to manage screen time thoughtfully rather than eliminating devices entirely.