Evaluations of the prevalence and mean level of delinquent acts across the age groups confirms previous suggestions that delinquent behavior follows the adolescent years quite closely. Measures of three primary developmental domains -- family relations, social relations, and education/vocational orientations -- were taken and correlated with delinquent behavior across three substages of adolescence. The patterns of correlations suggest there is support for the view that a substantial portion of delinquent behavior is tied to struggles with adolescent development tasks. (Author abstract)