Targeted screen‑time risk, not averages

Average correlations between total screen time and adolescent mental health are small and misleading; we should shift research, policy and interventions toward identifying specific contexts, content, time windows, and vulnerable subgroups (for example, lonely teens, those with preexisting disorders, or night‑time use). Future work must prioritize intensive longitudinal measures and preregistered designs to find who is harmed, when, and why. — Reframing the debate from 'how many hours' to 'which uses and which youths' changes regulation, school policy, parental guidance, and where public mental‑health funding should go.