"This Page is about behavioral individuality in infants, children and adults. It is intended as a clearinghouse for research and practical information about temperamental characteristics to be used by parents, students, professionals and others who have an interest in temperament.
Temperament as defined here refers to individual differences in behavioral style, the study of which follow from the work of Alexander Thomas and
Stella Chess and colleagues in the New York Longitudinal Study which began in the 1950's. This page is not limited to just that work, however; it
includes other models and frameworks that have grown out of the initial studies." studies.