1. Methodological and conceptual issues in digital media research Kaveri Subrahmanyam and Minas Michikyan; 2. Theoretical foundations of social media uses and effects Patti M. Valkenburg; 3. Digital media and the dual aspect of adolescent identity development: the effects of digital media use on adolescents' commitments and self-stories Hiromitsu Morita, Nastasia Griffioen and Isabela Granic; 4. Peer relations processes in the context of digital media Samuel E. Ehrenreich; 5. Digital media and the developing brain Michelle Chiu and Jason Chein; 6. Adolescents' digital media interactions within the context of sexuality development Chelly Maes, Johanna M. F. van Oosten and Laura Vandenbosch; 7. Culture and digital media in adolescent development Adriana M. Manago and Jessica McKenzie; 8. Marginalized and understudied populations using digital media Linda Charmaraman, J. Maya Hernandez and Rachel Hodes; 9. Depression and anxiety in the context of digital media Megan A. Moreno and Anna F. Jolliff; 10. The role of digital media in adolescents' body image and disordered eating Savannah R. Roberts, Anne J. Maheux, Brianna A. Ladd and Sophia Choukas-Bradley; 11. Digital media in adolescent health-risk and externalizing behaviors Michaeline Jensen, Mariani Weinstein, Morgan T. Brown and Jessica Navarro; 12. Problematic digital media use and addiction Sarah E. Domoff, Aubrey L. Borgen, Bonny Rye, Gloria Rojas Barajas and Katie Avery; 13. The effects of digital media and media multitasking on attention problems and sleep Susanne E. Baumgartner; 14. Digital media, suicide, and self-injury Kaylee Payne Kruzan and Janis Whitlock; 15. School-based initiatives promoting digital citizenship and healthy digital media use Emily Weinstein and Carrie James; 16. Digital media interventions for adolescent mental health Jessica L. Hamilton, David M. Siegel and Matthew M. Carper.