This article suggests that what kind of TV young kids are watching is just as important as how much. The author suggests that watching shows with a fast-paced storyline and different images flashing across the screen every few seconds can lead to a shorter attention span later in school. Furthermore, kids who have the ability to focus well in preschool have higher graduation rates, longer marriages and lower risks of substance abuse.
http://wjhl.com/2015/11/19/study-fast-paced-tv-harmful-to-kids-brain-development/
