This volume of New Directions for Child and Adolescent Development enhances our knowledge of the adolescent peer world in terms of both interpersonal relationships and social categories. Using diverse research questions, samples, and methodology, the authors shed light on an array of questions about adolescent social life, including: How changeable is peer group influence over time? Do adolescents identify with the crowd to which they are classified by their peers, or do they identify more closely with higher status crowds? How do adolescents form alternative groups that resist the cultures of the dominant peer group? Does having a sibling or dating partner make a difference in other relationships? The chapters illustrate the crucial role that peer relationships play in identity formation, and demonstrate the importance of viewing the peer world as a dynamic and changeable place.

This is the 84th issue of the quarterly journal New Directions for Child and Adolescent Development.