About The Study: This study found that U.S. adolescents, on average, spent more than an hour using smartphones during school, with social media use accounting for most of that time. These objective findings from a large sample extend those of a prior smaller study based on self-report, which similarly demonstrated 1 hour of smartphone usage per school day.
Corresponding Author: To contact the corresponding author, Jason M. Nagata, MD, MSc, email jason.nagata@ucsf.edu.
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(doi:10.1001/jama.2025.23235)
Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.
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Journal
JAMA