mitch prinstein is the chief science officer at the american psychological association.essor of psychology and neuroscience at the university of north carolina at chapel hill. and emma lembke joins us. she is the founder of the log off movement, which is to get -- a movement to get kids offline. she testified before the senate last week. she's now a sophomore studying political science at washington university in st. louis. i want to go to part of what you told senators last week in congress. >> as my screen time increased, my mental and physical health sutter. the constant quantification of my worth through likes, comments, and followers heightened my anxiety and deepened my depression. as a young woman, the constant exposure to unrealistic body standards and harmful recommended content led me toward a disordered eating and severely damaged my sense of self. amy: emma lembke , a sophomore in college addressing the senate judiciary committee. thank you so much for joining us today. talk about exactly what happened to you? the amount of time you spent online and how it af