Jacqueline Nesi is an Assistant Professor in the Department of Psychiatry and Human Behavior at the Warren Alpert Medical School of Brown University. Eva H. Telzer is an Associate Professor of Psychology and Neuroscience at the University of North Carolina at Chapel Hill and Co-Director of the Winston National Center on Technology Use, Brain, and Psychological Development. Mitchell J. Prinstein is the John Van Seters Distinguished Professor of Psychology and Neuroscience at the University of North Carolina at Chapel Hill, and the Chief Science Officer at the American Psychological Association and Co-Director of the Winston National Center on Technology Use, Brain, and Psychological Development.

'Adolescence, which has always been a period of increasing vulnerability to the onset of mental health problems, has recently also become the period of life when young people enter new digital realms. The impacts of digital media on healthy adolescent development is therefore an issue about which families, educators, policy-makers, legislators, and digital designers are all seeking answers. However, public discussion of this issue often produces more heat than light. This volume brings together an impressive list of experts to provide an up-to-date summary of the theoretical models and research findings that can guide a new evidence-based understanding of these issues.' Nicholas B. Allen, Ann Swindells Professor of Clinical Psychology, University of Oregon, USA

• 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.

Jacqueline Nesi is an Assistant Professor in the Department of Psychiatry and Human Behavior at the Warren Alpert Medical School of Brown University. Eva H. Telzer is an Associate Professor of Psychology and Neuroscience at the University of North Carolina at Chapel Hill and Co-Director of the Winston National Center on Technology Use, Brain, and Psychological Development. Mitchell J. Prinstein is the John Van Seters Distinguished Professor of Psychology and Neuroscience at the University of North Carolina at Chapel Hill, and the Chief Science Officer at the American Psychological Association and Co-Director of the Winston National Center on Technology Use, Brain, and Psychological Development.

'Adolescence, which has always been a period of increasing vulnerability to the onset of mental health problems, has recently also become the period of life when young people enter new digital realms. The impacts of digital media on healthy adolescent development is therefore an issue about which families, educators, policy-makers, legislators, and digital designers are all seeking answers. However, public discussion of this issue often produces more heat than light. This volume brings together an impressive list of experts to provide an up-to-date summary of the theoretical models and research findings that can guide a new evidence-based understanding of these issues.' Nicholas B. Allen, Ann Swindells Professor of Clinical Psychology, University of Oregon, USA

• 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.

Jacqueline Nesi is an Assistant Professor in the Department of Psychiatry and Human Behavior at the Warren Alpert Medical School of Brown University. Eva H. Telzer is an Associate Professor of Psychology and Neuroscience at the University of North Carolina at Chapel Hill and Co-Director of the Winston National Center on Technology Use, Brain, and Psychological Development. Mitchell J. Prinstein is the John Van Seters Distinguished Professor of Psychology and Neuroscience at the University of North Carolina at Chapel Hill, and the Chief Science Officer at the American Psychological Association and Co-Director of the Winston National Center on Technology Use, Brain, and Psychological Development.

'Adolescence, which has always been a period of increasing vulnerability to the onset of mental health problems, has recently also become the period of life when young people enter new digital realms. The impacts of digital media on healthy adolescent development is therefore an issue about which families, educators, policy-makers, legislators, and digital designers are all seeking answers. However, public discussion of this issue often produces more heat than light. This volume brings together an impressive list of experts to provide an up-to-date summary of the theoretical models and research findings that can guide a new evidence-based understanding of these issues.' Nicholas B. Allen, Ann Swindells Professor of Clinical Psychology, University of Oregon, USA

• 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.