Finnish Study: More Screen Time Linked to Better Teen Cognition — SkimNews
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- University of Jyväskylä researchers found that greater screen time from childhood onward was associated with better cognitive processing in adolescence, in an eight-year follow-up of the PANIC study on children's physical activity and nutrition.
- The study included 124 girls and 136 boys with an average age of 15.8, with cognition measured via the CogState test battery; researchers cautioned the results show associations, not causal links between screen time and cognitive performance.
- Doctoral Researcher Petri Jalanko said screen time should not be viewed solely as harmful, arguing that digital activities involving "active thinking, problem-solving, creativity and learning" likely explain the association observed in the data.
- Physical activity links to cognition differed by sex: light-intensity activity since childhood was tied to better working memory in girls, while guided physical activity was linked to better working memory in boys.
- Lower levels of self-reported unsupervised physical activity were associated with better cognitive processing — a pattern the researchers called unexpected.
- Sensor-based measurements of movement and heart rate showed no association with cognitive processing, possibly because the devices cannot determine what a person is actually doing during periods labeled active or inactive.
- The findings were published in Pediatric Exercise Science (2026, Vol. 38, Issue 3), and researchers called for intervention studies to establish causal links and clarify sex-specific effects.
Why it matters: For parents, educators, and pediatricians who treat screen time as uniformly harmful, the University of Jyväskylä's PANIC study challenges that assumption by suggesting the nature of screen activities — not screen time itself — may matter more for adolescent cognition. Researchers explicitly emphasized the findings show association, not causation, and called for intervention studies before any policy or parenting guidance changes.
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