In 1934 the authors of this book published a report covering the careers of 1,000 delinquent boys over a period of five years after they had been brought before a juvenile court. The present work continues the study of as many of the original group as could be found over an additional ten year period. The careers of delinquency or of recovery are described in five year periods, the original work of 1934 constituting the first of these periods. The fifteen years that has elapsed since these boys were before the Boston Juvenile Court, at an average age of 13 1/2 years, have seen them enter adulthood.
The authors note a steady increase in the proportion of delinquents who abandon criminal behavior, and among those who remain delinquent the delinquencies tend to become notably less serious in character. However, a relatively large number of the offenders continue to be delinquent,