Study challenges simple links between kids' screen time and developmental difficulties

Researchers from the University of Edinburgh and Imperial College London find no clear link between children’s general screen use and later psychosocial issues, urging a focus on activity types rather than total time.

Researchers from the University of Edinburgh and Imperial College London have found no clear-cut link between children’s screen use and later psychosocial development, adding nuance to a debate that has often focused on broad limits for digital devices. Their analysis, published in JAMA Network Open, drew on data from almost 3,800 children in Scotland and tracked screen habits at ages 5, 10 and 15 alongside emotional, behavioural and social outcomes.

The study found no meaningful association between screen time and developmental difficulties at ages 5 and 10. By age 15, the only pattern linked to higher difficulty scores was very heavy engagement with electronic games, not screen use more generally. According to the researchers, this suggests that advice centred solely on total screen time may miss the more important question of what children are actually doing on their devices.

The findings also point to a more complicated picture for social media. Teenagers aged 15 who spent more than an hour a day on social platforms were less likely to score above average for difficulties than those using them for less than an hour. The authors said this may reflect the social benefits of messaging and online contact with peers, while also noting the reverse may be true: youngsters who are already doing well socially may simply be more inclined to use those apps.

The researchers cautioned that their data began in 2009, when smartphones and tablets were far less common than they are now, so the modern environment may look different. They said future work should focus less on screen duration alone and more on the type of activity, whether children are gaming, communicating or doing something else, and whether they are using screens on their own or with other people. That broader approach, they argued, would be more useful than rigid time limits, including the World Health Organisation’s advice that children under 5 should spend no more than an hour a day on screens.