Sexual assault literature reveals inconsistencies regarding important issues in establishing prevention and intervention standards. The Delphi inquiry technique was used to examine concepts and criteria for practice and to explore assumptions and value dilemmas in sexual assault prevention and treatment. Expert judgments were made by 51 nationally-based participants in the sexual assault field. Questions about intervention with sexual assault victims revealed that assisting victims in coping with emotional and physical trauma and minimizing risk to potential victims were the respondents' highest priority goals. In terms of intervention with assailants, participants emphasized behavioral change outcomes; the use of constructive behavioral alternative in place of coercive sexuality was given highest importance for assailants and potential assailants. In the area of primary prevention, participants ascribed high priority to changing social institutions and individual attitudes and behaviors to alleviate conditions that permitted sexual assault. Respondents expressed uncertainty as to the best way to accomplish primary prevention. Participants found legal definitions inadequate from conceptual and practical standpoints; they preferred the concept "sexual assault" to "rape" and recommended defining that concept as simply "any forced sexual activity." Results suggest several implications for intervention, prevention, treatment, research, and policy. (NRB)