Targeted, not total, teen‑tech policy

Rather than regulating overall hours online, policy and practice should focus on specific features (cyberbullying, sleep‑disrupting night use, addictive mechanics) and on vulnerable subgroups identified by longitudinal and ecological momentary assessment studies. The evidence shows average usage has small associations with harms, so interventions should be precision‑targeted and backed by better causal research. — Shifting the frame from 'screen time limits' to targeted harm‑reduction would reorient legislation, school policy, and parental guidance toward interventions that evidence suggests are likeliest to help.