Data from the 1986 Northern Finland Birth Cohort Study (n = 4,645) were used to examine the influence of mid-adolescent (age 15) school outcomes on late-adolescent (ages 17-19) risk of criminal conviction. Consistent with social-developmental theories of offending, we found that poor academic performance and reduced school attachment increase the…

Studied patterns of boys' social development by examining data from two longitudinal studies: a Finnish study of eight year olds begun in 1968; and a French Canadian study of six year olds begun in 1984. Patterns were identified using variables of aggression, hyperactivity, inattentiveness, anxiety, and lack of prosocial behavior. (LB)