Adolescents who had accumulated more screen exposure since childhood tended to show better cognitive processing during the teenage years. Among boys, higher levels of guided physical activity from childhood through adolescence were associated with better working memory. At the same time, the researchers observed an unexpected association: lower levels of self-reported unsupervised physical activity were linked with better cognitive processing in adolescence. Light-intensity activity appeared relevant to girls’ working memory, while guided activity showed an association with boys’ working memory. Because the PANIC analysis followed naturally occurring behaviors rather than assigning children to specific amounts or types of screen use, it cannot prove that more screen time produced better cognitive processing.