Finnish 8-Year Study Links Higher Childhood Screen Time to Better Teen Cognition

3 articles · Updated · ScienceDaily · Aug 17

260 Finnish adolescents tracked for 8 years showed better cognitive processing at age 15.8 when they had accumulated more screen time since childhood.
Researchers said the result points to screen use quality rather than screen exposure alone, with learning, creativity and problem-solving activities the most plausible drivers.
Physical activity showed mixed links: girls with more light activity had better working memory, while boys benefited more from guided exercise; lower unsupervised activity also correlated with better cognition.
Device-based measures of movement and sedentary time showed no clear cognitive link, suggesting questionnaires may capture what children were actually doing better than sensors can.
The PANIC study, published in Pediatric Exercise Science, found associations only—not causation—and researchers said low adolescent physical activity still remains a public health concern.