Dr. Ellis’ research interests span a range of topics related to social development in childhood and adolescence. Her main research focus has been on group influence and documenting the processes through which children’s groups influence their members in both positive and negative domains. Dr. Ellis also has a keen interest in studying popularity, aggression, bullying, and teen dating violence. Most recently, Dr. Ellis has been working with her thesis students to design studies on cyberbullying and cyberdating abuse. Among other courses, Dr. Ellis teaches Developmental Psychology and a seminar on Social Relationships in Childhood and Adolescence.