Skip to content. Skip to navigation. The National Longitudinal Study of Adolescent to Adult Health Add Health is a longitudinal study of a nationally representative sample of adolescents in grades in the United States during the school year. The Add Health cohort has been followed into young adulthood with four in-home interviews, the most recent in , when the sample was aged
Adolescence is the period of transition between childhood and adulthood. It includes some big changes—to the body, and to the way a young person relates to the world. The many physical, sexual, cognitive, social, and emotional changes that happen during this time can bring anticipation and anxiety for both children and their families.
Adolescence from Latin adolescere , meaning 'to grow up'  is a transitional stage of physical and psychological development that generally occurs during the period from puberty to legal adulthood age of majority. For example, puberty now typically begins during preadolescence , particularly in females. Thus, age provides only a rough marker of adolescence, and scholars have found it difficult to agree upon a precise definition of adolescence. A thorough understanding of adolescence in society depends on information from various perspectives, including psychology, biology, history, sociology, education, and anthropology. Within all of these perspectives, adolescence is viewed as a transitional period between childhood and adulthood, whose cultural purpose is the preparation of children for adult roles.