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The Australian Temperament Project (ATP) is a longitudinal study of the psychosocial development of a representative sample of Australian children born in the state of Victoria between September 1982 and January 1983. The study aims to trace the pathways to psychosocial adjustment and maladjustment across the lifespan, and to investigate the contribution of personal, family and environmental factors to development and wellbeing. A major theme is the influence of an individual's temperament upon their emotional and behavioural adjustment.
The initial sample consisted of 2443 families from urban and rural areas of the state. About 65% of the families are still participating in the study after 24 years