Part I describes a followup that determined the favorable effect of juvenile court adjudication on youth having first contact with the juvenile justice system. This includes a description of a method for following up previously adjudicated delinquents. Part II contains autobiographical comments by former juvenile delinquents regarding various factors that influenced their development into and out of delinquency. Some factors identified are the supportive presence and guidance of caring persons, imagery as a motivating factor in delinquency involvement and cessation, early intervention, and encouragement and support for the 'turnaround.' Part III addresses various process factors involved in delinquency treatment, including attachment; development and desistance; and the evolution, devolution, and disruption of treatment of an antisocial child. Suggestions for action are presented in Part V. Suggestions are offered for keeping youth in school, using training schools for positive impacts, and how to improve the effectiveness of parole for juveniles. Chapter data and references, author and subject indexes.