In the problem of assessing social attitudes, there is a very real need for instruments which do not destroy the natural form of the attitude in the process of describing it. There are also situations in which one would like to assess "prejudice" without making respondents selfconscious or aware of the intent of the study. At the present time there are few if any indirect tests which could confidently be used for either of these purposes. There are, none the less, a considerable number of techniques that have been partially explored and validated. It is the purpose of this paper to survey such techniques and to present a point of view with regard to the problem of indirect measurement.Current interest on the part of social psychologists in the indirect assessment of attitudes is perhaps primarily an aspect of the larger projective test movement in personality study. However, as will be seen in the course of this survey, there has been an interest in this approach from the very first efforts in attitude measurement (81), anticipating by some ten years the current interest in "projective techniques."The terms "indirect" and "projective" have been used to refer to both disguised, and to non-structured measurement efforts. Using these two terms alone, one could distinguish four types of tests:1. Non-disguised-sifuctufed: the classic direct attitude tests of Thurstone (78), Likert (49), et al.2. Non-disguised-non-structured: the free-response interview and questionnaire approaches, the biographical and essay studies.3. Disguised-non-structured: the typical "projective" techniques. 4. Disguised-structured: tests which approximate the objective testing of attitudes.