https://thenextweb.com/science/2018/07/19/study-links-frequent-gadget-use-to-increased-adhd-symptoms-in-teens/

It’s no secret that the number of hours teens spend on electronic devices has some impact on their well-being. What scientists disagree on, however, is just how much.

The latest study, published in the Journal of the American Medical Association, has linked Attention Deficit/Hyperactivity Disorder Symptoms to teens who frequently use electronic devices. Out of 2,586 high school students studied over a two-year period, those who consumed multiple types of digital media were about twice as likely to report strong ADHD-like symptoms as their peers.