Research difficulties include sampling problems, the lack of information on abusers, the distortions resulting from the use of self-reports, and the lack of comparison groups. Other problems include the frequent absence of links between the research and broader theories in psychology and the lack of analysis of the relative importance of variables associated with domestic violence. Questionnaires and interviews are often used in this research. They could be improved through the designation of original hypotheses, the framing of precise questions, and the development of meaningful response options. Finally, research that focuses on special population groups with respect to treatment outcomes, results of prevention programs, and causal factors would best serve public policy until larger questions regarding domestic violence are answered.