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 .
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
(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.
Embed this link to provide your readers free access to the full-text article This link will be live at the embargo time https://jamanetwork.com/journals/jama/fullarticle/10.1001/jama.2025.23235?guestAccessKey=f4c023a2-8f3b-4729-98ea-635e11c19985&utm_source=For_The_Media&utm_medium=referral&utm_campaign=ftm_links&utm_content=tfl&utm_term=010526
JAMA