This handbook offers comprehensive coverage of the topics that are relevant to the field of adolescent and young adult development. The "APA Handbook of Adolescent and Young Adult Development" reviews the many factors that impact youth development across varying themes including biological underpinnings, cognitive and emotive processes, development through social contexts and roles, diversity in adolescence and the transition to adulthood, risk behaviors and psychopathology, positive youth development, intervention and policy, and new directions. The expert coeditors have recruited a new generation of top scholars as chapter authors to ensure that this comprehensive guide is thorough, detailed, and invaluable to readers. The handbook is also integrative and incorporates diversity so that clinicians, graduate students, and researchers can gain further understanding and apply this knowledge to a wider range of the population.