Juby and Farrington
Aim: to compare delinquency rates among boys from permanently disrupted families compared to boys from intact families.
Longitudinal study into the development of offending and anti- social behaviour.
Data collected on parents and boys
Juvenile convictions, juvenile self reported delinquency and adult convictions.
The participants parents and teachers were interviewed and they were also tested for individual factors such as intelligence.
411 South London males born in 1953.
Overwhelmingly white, urban, working class and UK origin.
At age 48, 394 were still alive and 365 were interviewed - 93% of the surviving sample.
1. Offending was very much concentrated in families. Just 4% of the 400 families accounted for 50% of all convictions.
2. Delinquency rates were higher among the 75 boys living in permanently disrupted families on their fifteenth birthday compared to boys living in intact families. 29% of those form disrupted families had a juvenile conviction as opposed to 18% of those form intact families.
3. Delinquency rates in disrupted families were similar to those in high conflict intact families.
4. Boys who lost their mothers were nearly four times more likely to be delinquent than boys who lost their fathers.
5. Disruption caused by parental disharmony (broken homes), were more damaging than those caused by parental death.