Across 355,358 adolescents, screen time explained at most 0.4 percent of the differences in well-being
Orben and Przybylski ran every defensible analysis on three big surveys. Technology use was linked to lower well-being, but the link was tiny: eating potatoes was nearly as bad, and wearing glasses was worse.
Caveat on this rating: Correlational self-report surveys with broad screen-time items from 2007 to 2016; a small average can hide larger effects for some young people or uses. One author discloses unpaid advisory roles to Facebook and Google. The opposite reading of similar data (Twenge) remains contested.