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A new study from the University of Washington gets specific about how much screen time teens clock on their phones during the ...

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It’s no secret teens spend a lot of time in front of screens – something like eight and a half hours daily, according to a 2021 survey.

U.S. adolescents spend more than one hour per day on smartphones during school hours, with social media accounting for the largest share of use, according to research published Jan. 5, 2026, in JAMA.

Nagata believes the hour-plus that teens spend on their phones at school "inevitably competes with attention to learning." He ...