What are the four different types of questions of concern in an evaluation study and how can concept questions be recognized and answered? These issues are addressed in this paper, in the framework of a compensatory education program evaluation. The discussion includes (1) the identification of concept questions and how they are different from fact, technical, and value questions; (2) a description of three types of analysis (differentiation, generic, and conditions) useful in dealing with concept questions in evaluation; and (3) a discussion of the use of concept maps in evaluation. (PN)