An Analysis of the Validity of Health Questionnaires

to both demands of role and self and level of information. No attempt has been made in this report to show how a sociological conception of field work roles can do more than provide lines of thought and action for dealing with problems and processes of field interaction. Obviously, however, a theory of role and self growing out of study of field interaction is in no sense limited to that area of human activity. Learning to take and play roles, although dramatized in the field, is essentially the same kind of social learning people engage in throughout life. In any case, the foregoing discussion has suggested that a field worker selects and plays a role so that he, being who he is, can best study those aspects of society in which he is interested.