Recent research indicates that introductory psychology college students continue to be the primary source of subjects for psychological research. This extensive use of involuntary subjects in a required service subject pool raises numerous important questions for science and for educational and professional ethics. A general overview of research relevant to the attainment of the goals associated with these questions is presented. To resolve such questions, it is suggested that the principles and practices of evaluation research be applied, to produce a comprehensive assessment of the effectiveness and general impact of the extensive use of introductory psychology students. A decision-theoretical method for such an evaluation is outlined. (Author)