Chapter 1. Changes in online subjectivity: artificial users, subject fragmentarization, and multimodal interaction -- Chapter 2. Psychological benefits and detrimental effects of online social networking -- Chapter 3. Relational body identities: body image control through self-portraits a revision of the body image control in photos questionnaire -- Chapter 4. Desired speed of reply during text-based communication via smartphones: a survey of young Japanese adults -- Chapter 5. Public relations and advertising in the context of e-sports -- Chapter 6. Social media and TV watching metrics -- Chapter 7. Facebook depression or Facebook contentment: the relation between Facebook use and well-being -- Chapter 8. Offending, victimization, forensic investigation, and prevention of cyberstalking -- Chapter 9. Cyberbullying -- Chapter 10. Internet addiction and online gaming: an emerging epidemic of the twenty-first century? -- Chapter 11. Cybersex -- Chapter 12. The effect of social networks on relationships outside the network -- Chapter 13. Romantic relationships, online dating, and mental health issues -- Chapter 14. Impact of online dating, cyber stalking, cybersex, and pornography on mental health -- Chapter 15. Empowering technology use to promote virtual violence prevention in higher education context.