This paper reviews 20 cross-cultural studies conducted with the Defining Issues Test (DIT). All or part of the samples in the studies were non-Americans who had not been a part of the populations presented in the DIT manual. The studies were aimed at the comparison of moral reasoning structure and development across cultures. Several aspects of the findings were reviewed: (1) the psychometric properties of cultural versions of the DIT; (2) effects of the examinee's ethnic background; (3) age and education trends; (4) sex differences; (5) correlations with other psychological tests; (6) religious differences; (7) urban-rural milieu; (8) delinquent behavior; and (9) familial and social factors. The studies reviewed in this report satisfy the evaluation criterion of the generalizability of psychological theories developed in one culture to another culture. The DIT seems to have cross-cultural validity in detecting moral reasoning structure and its development in cultures outside the United States. The validation and explanation roles of the DIT in cross-cultural studies should be pursued together. (DWH)