A series of articles published October 4 in the medical journal The Lancet declares that problematic digital media use among children and young people is a public health issue. According to the authors, parental screen-time limits and young people's self-control are no match for what they call "the digital determinants of health."
The series is based on an umbrella review of 2,790 studies, covering more than nine million participants under the age of 25. It found a consistent link between problematic use and depression, anxiety, sleep disorders and less physical activity. The researchers stress that the issue is not simply how much time is spent in front of a screen. Their measure is use that is difficult to control and that continues even when it interferes with studies, work and social life. In children up to age 10, heavy screen time was linked to fewer hours of sleep and harm to cognitive, emotional and social development. By contrast, moderate use and video games involving physical movement were linked to higher mental wellbeing.
"Digital platforms are designed to capture attention and collect data, not to protect health," said one of the authors, Dr. Jay Shaw of the University of Toronto. He added that infinite scrolling, autoplay and personalized recommendations are "intentional design choices." The researchers are calling on companies to test health risks before launching new products and to share data with independent researchers.
Shaw praised proposed legislation in Canada, bills C-34 and C-36, saying they "hit the mark almost exactly." Under the proposals, social networks would be restricted to users under 16 unless the platforms can prove they have adequate protections in place. Meta responded that accounts for users under 16 have settings enabled by default that allow parents to limit usage time.
Not everyone is convinced. Dr. Alex Beattie of Victoria University in Wellington warned against "confusing correlation with causation." He also questioned whether a ban on use under age 16 would solve the problem. Even the series' authors acknowledge that proving causation is difficult, but argue that the sheer scale of the phenomenon already justifies "public health precautionary measures."
