A simplified method for measuring infant temperament.

A questionnaire has been developed for assessing temperamental characteristics of babies in the 4 to 8 month range and has been initially standardized on 101 babies in a single private practice. It is based directly on the research interview technique of Thomas and associates 1 and yields similar results, but it can be completed by the mother in about 20 minutes and scored in less than 10. Its principal value is in determining the presence of the characteristics of the difficult baby syndrome, which may be inadequately differentiated in the mother's general description. There are other possible applications in practice, teaching, and research.