A new study suggests that teens that are online for more than an hour a day tend to be unhappier. The happiest teens used digital media for less than an hour per day. But after a daily hour of screen time, unhappiness rises steadily along with increasing screen time.
https://www.sciencedaily.com/releases/2018/01/180122091249.htm
http://psycnet.apa.org/record/2018-02758-001?doi=1
