Research Letter
Smartphone Use During School Hours by US Youth in the Adolescent Brain Cognitive Development Study
JAMA 10.1001/jama.2025.23235January 05, 2026 at 11:00 AM EST
This study uses data on smartphone usage in schools from the ABCD (Adolescent Brain Cognitive Development) Study to characterize smartphone app usage during school hours in a diverse sample of US adolescents.
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