An objective questionnaire technique has been developed for measuring ego states using the Egogram model. Tests show the method has good reliability and validity characteristics. In a statewide survey of a sample of 1044 adults, significant differences were found in the amounts of Critical Parent, Nurturing Parent, Adult, Free Child and Adapted Child expressed by sex, age, education, and ethnic background. Studies of recovering alocholics and prison inmates also found significant ego state profile differences from the general population in directions consistent with TA theory. A study of the public's ego state perceptions of Jimmy Carter and Gerald Ford prior to the 1976 election showed significant influences on voting intention of the candidates' degrees of projected Nurturing Parent, Adult, and Free Child ego states. The questionnaire is applicable to clinical and social survey research, and can be used for diagnosis and treatment in the same manner that Egograms are used.