New research highlights the cognitive and social risks of excessive screen time for children

Emerging studies suggest that prolonged screen use may hinder key developmental skills in children by displacing vital real-world activities, prompting experts to recommend balanced digital habits.

New research is sharpening concern that long hours in front of screens may do more than displace playtime: it may also crowd out the experiences children need most to build language, movement and social skills. A review published in Brain Health, discussed by CNN, argues that childhood and adolescence are periods when sensory input, physical activity and face-to-face interaction help shape the brain in ways that can last for years. It adds that the issue is not only the device itself, but the real-world activities children miss while using it. ()

That concern is consistent with earlier findings. In JAMA Pediatrics, researchers led by Sheri Madigan of the University of Calgary tracked 2,441 children aged two to five and found that heavier screen use was linked to weaker later development in communication, problem-solving, behaviour and social interaction. The study suggested the effect was not simply that children with developmental difficulties happened to use screens more; rather, screen exposure itself appeared to be associated with poorer outcomes over time. ()

Other research has pointed in the same direction. A preliminary decade-long National Institutes of Health study reported that children who spent more than two hours a day on screens tended to score lower on thinking and language tests, while those with the heaviest use showed signs of cortical thinning on brain scans. Separately, a study published in The Lancet Child & Adolescent Health found that limiting screen time to two hours a day was associated with better brain function in children aged eight to eleven. ()

Experts say the answer is not simply to ban devices, but to replace passive screen use with richer activities such as reading, sport, music, art, family interaction and unstructured play. The Brain Health paper also warns that screens can encourage less movement and more snacking, while highly stimulating digital content may make everyday activities seem less engaging by comparison. Researchers and clinicians say a gradual reduction plan often works better than abrupt restriction, especially when parents model the same habits themselves. ()

Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.