ABSTRACT
A longitudinal study of 565 children from birth to age 9 supports the Thomas–Chess model: later adjustment reflects the complex interaction of early temperament profiles, CNS disability, parental interactions with the child, family disruption, and external stressors (particularly, economic poverty). A regression model predicted 28% of variance in conduct disorder measured at age 9. Variables in this model are difficult temperament at age 2, CNS disability at age 6, maternal stress when child aged 6, and child’s parental separation > 6 months, at ages 2 to 9. Statistical models rarely demonstrate causal pathways beyond reasonable doubt. Intuitive insights gained from statistical analyses can however lead to collection of detailed case material as a basis for understanding causal pathways, and offering individualized intervention and therapy. This is illustrated by two case histories.
