Recent Canadian research found that teenagers 13-18 years of age are spending over 6.5 hours a day on a screen-based device (that’s almost the equivalent of a full-time job!). For Australian teenagers, it’s around half that at 3.3 hours a day; 4.5 hours a day for American teenagers.

However, is all this screen time such a bad thing? It seems so. A new study out of The University of Michigan makes a direct correlation between a significant and sudden drop in adolescent happiness since 2012 and the proliferation of smartphones.