Sullivan's Ethical Reasoning Scale contains three dilemmas with response pairs representing Kohlberg's stages of moral development. In Kohlberg's first three stages, goodness is equated with lack of punishment, usefulness, and approval, respectively. Good is seen as conformity to rule and ruler in stage four, and stage five comprises considerations of social contract, higher law, and God. In Sullivan's instrument, ordinal level responses to the dilemmas are used to determine between-stage distances and variability in these distances are used for comparing moral judgment trait levels. The stimuli in each test item represent two different stages, but not different behaviors. As a result, subjects must choose between reasonings, rather than courses of action, to resolve dilemmas. Test items in English and Spanish, a short form of the test, and scoring keys are appended. Research on stage sequence and relationship of trait level to age and sex of respondent is replicated on 1,100 subjects (aged 11-76) and summative scores are included. Item parameters, including difficulty, discriminating power, and generalizability are calculated. In addition, the instrument is discussed as a means for comparing group differences in moral judgment. Also included are instructions for administration and scoring of the test for individual and group settings. (Author/JAC)