This is such a one sided study from the beginning. Their needs to be a counter study to kids not using phones and such to show kids developing are roughly the same. Why are kids weaker in those categories, look at the programs the parents are showing their kids. Did you investigate every video/ thing they did on the phone? Did they just throw on a funny cat video to distract the kid? Did they look up something educational to show the kids to distract them? Did they just put on a coloring app for the kids to doodle. Of course they would be weaker if they are not shown the educational stuff.

“We don’t know they are educational videos or not.”  This line alone says it all about the study from the doctor himself. So how did you prove anything aside from neglect of a kids education at a young age and blaming it on “Screen Time.” What really are you doing with that “Screen Time” if it’s junk, you know junk.

Ground-breaking look at the impact of screen time on kids' brainsvia @YouTube