Account Deleted By User Adolescent Brain Cognitive Development (ABCD), have determined that children who spend more than two hours of daily screen time score lower on thinking and language tests. In brain scans of 4,500 children, daily screen usage of more than seven hours showed premature thinning of the brain cortex, the outermost layer that processes information from the physical world. Though the difference was significant from participants who spent less screen time, NIH study director Gaya Dowling cautioned against drawing a conclusion. https://www.bloombergquint.com/technology/screen-time-changes-structure-of-kids-brains-60-minutes-says#gs.yEWUvlw https://abcdstudy.org/about.html