New review links heavy screen time in childhood with diverse developmental and mental health issues

A comprehensive analysis from JAMA Pediatrics reveals that excessive digital media use among children correlates with poorer academic performance and increased emotional and social difficulties, raising concerns about modifiable risk factors for child wellbeing.

A large review published in JAMA Pediatrics suggests that heavy screen use in childhood is linked with a range of developmental and mental health concerns, with some of the associations comparable to those seen with other well-known family and birth factors. Researchers from the University of Calgary analysed evidence drawn from earlier systematic reviews and studies covering more than 2.8 million children in 64 countries, according to the paper and reporting highlighted by The Independent.

The review found that greater use of digital media, including video games, social platforms and streaming services, was associated with lower overall school performance and weaker language development. However, the link was not consistent across every academic subject. In particular, the researchers did not find a clear relationship with maths, reading or science scores, and they said those areas remain less thoroughly studied, which may limit how firmly the evidence can be interpreted.

The analysis also connected heavier screen exposure with a broader set of emotional and social difficulties. Children who spent more time with digital media were more likely to show problems with peer relationships, internalising symptoms such as anxiety and depression, and externalising behaviours including aggression and signs associated with attention-deficit hyperactivity disorder. At the same time, the review did not find clear evidence that screen time was tied to executive function, pro-social behaviour or performance in some academic areas.

The findings add to a growing body of research suggesting that screen habits may be one modifiable factor in child wellbeing. But the authors stressed that their work shows association, not causation, because it pulled together earlier studies rather than tracking children in a single experiment. Other research published in JAMA, JAMA Network Open and JAMA Pediatrics has also reported links between digital media use and poorer youth mental health, including findings that heavier social media use, more than two hours of daily screen time, or certain screen content can coincide with worse psychological outcomes, though those studies too do not prove screens are the direct cause.