U.S. adolescents may spend more time on their smartphones during school hours than their parents would like, according to data from the Adolescent Brain Cognitive ...

A Japanese city will urge all smartphone users to limit screen time to two hours a day outside work or school under a proposed ordinance that includes no penalties. The limit—which will be recommended ...

U.S. adolescents spent more than an hour per school day using smartphones. Social media topped the list of most-used app categories, with a mean of nearly 30 minutes. New data come amid rapid changes ...