Parents have spent a decade limiting their children's screen time to protect their brains. A new 8-year study found children with more screen time had better cognitive processing as teenagers.
For the past decade, limiting children's screen time has been one of parenting's most confident positions. The American Academy of Pediatrics has issued guidelines. Schools have banned phones. Parents have negotiated, bargained, and enforced limits. The underlying assumption has been consistent: screens displace the activities that build children's brains, and more time on them means worse cognitive outcomes.
A research team at the Universities of Jyväskylä and Eastern Finland decided to test that assumption longitudinally. They enrolled children at around age 7 and followed them for eight years, measuring their physical activity, sedentary behavior, and screen time at regular intervals. At the end of the follow-up, when participants were around 15 years old, they sat the children down and tested their cognitive performance using a validated battery measuring learning, attention, and working memory.
The children who had accumulated more screen time over those eight years did not score worse. They scored better.
The researchers say the finding does not mean unlimited screen time is harmless. But it does challenge the assumption that screen time and brain development are simply in opposition, and it raises a question that the decade of warning labels, app timers, and parental anxiety largely skipped over: what are children actually doing on those screens?