From The Department of "Duh"

I wonder how much money was spent to figure this out:

Children who spend more time on using handheld devices and computers or watching television are more likely to exhibit behavior problems such as aggression, difficulties with attention, anxiety and depression, an analysis published Wednesday by JAMA Psychiatry found.

In the review of data from 87 studies with nearly 160,000 participants age 12 years and younger, more screen time during the day was associated with an up to 20% higher risk for behavior problems, the data showed.

The behavior problems exhibited by children with increased screen time included aggression and "inattention," the researchers said.

Children who spent more time using devices with screens, including phones, tablets, computers and televisions also were more likely to display symptoms of anxiety and depression, according to the researchers. 

I'm shocked, shocked I say.