Any professional or scientific discipline has a responsibility to do what it can to ensure ethical behavior on the part of its members. In this context, this paper outlines and explores the criticism that to date the emphasis in ethics training in professional psychology, as with other disciplines, has been on the rational elements of ethical decision making, with insufficient attention to the role of emotions and other nonrational elements. After a brief outline of some of the historical background to (...) the development and understanding of ethical decision making, relevant theoretical and empirical literature on the influence of emotional and other nonrational factors on our ethical decisions is reviewed. The implications of this literature for ethics education and training are outlined, particularly with respect to the use of case studies. An integrative approach is proposed, and conclusions and recommendations are offered with respect to such an approach. (shrink)