The NIH's landmark ABCD study has published results showing that children spending more than 4 hours daily on screens have measurable structural changes in brain regions responsible for attention, impulse control, and emotional regulation.
Key Findings
- 12,000 children tracked from age 9 to 15
- 4+ hours screen time: thinner prefrontal cortex
- Reduced white matter integrity in attention networks
- Effects more pronounced with social media vs educational content
The AAP has updated its guidelines recommending no more than 2 hours of recreational screen time for children under 12 and suggesting screen-free periods before bedtime.
