Contents Acknowledgments ix Introduction xi 1 Social Relationships 1 Case Study: When the Internet First Visited Home 1 Introduction 2 Talking Face- to- Face and Friendships 3 Trends in Empathy 9 Prosocial Be hav ior 14 Effects with Special Populations 17 Conclusion 21 Interview with an Expert: Dr. Kaveri Subrahmanyam 22 2 Physical Aggression 25 Case Study: The Debate over Violent Video Gaming and Mass Shootings 25 Introduction 27 Effects of Violent Media on Our Physiology 27 Effects on Aggressive Thoughts and Emotions 31 Aggressive Be hav ior 34 Controversy over Violent Media Effects 40 Conclusion 42 Interview with an Expert: Dr. Jeanne Brockmyer 43 3 Electronic Aggression 47 Case Study: What Is Koobface? 47 Introduction 49 Cyberbullying 49 Online Privacy and Risky Online Be hav iors 54 The Perils of Youth 59 Other Aggressive Be hav iors 61 Mass Attacks 63 Individualized Attacks 65 Conclusion 68 Interview with an Expert: Dr. Robin Kowalski 69