Acquiring adequate levels of self-esteem and social competence is a crucial part of adolescents’ psychosocial development. Both are largely shaped in social interactions with others, especially with peers, a lot of which take place online. Maria Koutanis investigates the possible consequences of online communication for the psychosocial development of adolescents. She focuses on the long-term relationships between online communication and social competence and self-esteem. She also looks at the underlying processes that may explain these relationships and at differences and precursors that may predict which adolescents are most likely to experience positive or negative consequences of their online communication.