Family and school influences on behavioural development.

Research findings are reviewed with respect to possible family and school influences on behavioural development, but with special reference to socially disapproved conduct. The hypothesis that statistical associations between environmental variables and children's disorders represent causal connections is considered in terms of the three main alternatives--hereditary influences, the effect of children on their parents, and the operation of some third variable. It is concluded that each has some validity but that nevertheless there are true environmental effects. The mechanisms underlying their operation are discussed with respect to parental criminality, family discord, weak family relationships, ineffective discipline, and peer group influences. Individual differences in response to adversity are discussed in terms of age, sex, temperament, genetic factors, coping processes, patterning of stressors, compensatory good experiences and catalytic factors. The various ways in which environmental effects may persist over time are considered in terms of linkages within the environment as well as within the child. It is concluded that long-term effects are far from independent from intervening circumstances.