What can evaluation research tell us about social science theory? It is the purpose of this paper to examine that question. There has been much written in the current literature about the relationship between theory and practice. Because it is evaluation research (Breedlove, 1972: 71-89; Newbrough, 1966: 39-52; Suchman, 1971: 43-48; Suchman, 1967; Weiss, 1973: 37-45; Fitz- Gibbons and Morris, 1975: 1-4) that attempts to analyze the results of practice, it is the authors\u27 belief that an examination of evaluation research studies for possible contexts of theory failure will contribute to a linkage between theory and practice