why IQ scores are dropping

No.11116998 ViewReplyOriginalReport
MRI's show that excessive screen time in preschool years hinders brain development.
Pic related. Blue-highlighted white matter areas show lower structural integrity for kids with high screen time.

No wonder so many millenials are brainlets. No wonder there's so many anti-academic drones on /sci/.

https://jamanetwork.com/journals/jamapediatrics/fullarticle/2754101
>In this cross-sectional study of 47 healthy prekindergarten children, screen use greater than that recommended by the American Academy of Pediatrics guidelines was associated with (1) lower measures of microstructural organization and myelination of brain white matter tracts that support language and emergent literacy skills and (2) corresponding cognitive assessments.

https://jamanetwork.com/journals/jamapediatrics/article-abstract/2722666
>In this cohort study of early childhood development in 2441 mothers and children, higher levels of screen time in children aged 24 and 36 months were associated with poor performance on a screening measure assessing children’s achievement of development milestones at 36 and 60 months, respectively. The obverse association (ie, poor developmental performance to increased screen time) was not observed.