The purpose of this methodological study is to explore how well a process called "concept mapping" (Trochim, 1989) can articulate the theory which underlies a social program. Articulation of a program's theory is a key step in completing a sound theory based evaluation (Weiss, 1997a). In this study, concept mapping is used to articulate the outcomes domain of a program theory, using Chen's (1990) six domains for program theory as an organizing framework. A grassroots community organization in Denver, Colorado, provides context for the study. With reference to Dubin's (1978) distinctions for theoretical units as a guide, the results of concept mapping are analyzed to determine whether they are useful in building a program theory. Results are also are evaluated to determine whether they present a comprehensive, parsimonious (Whetten, 1989) and valid representation of outcomes from the community organizing intervention. Methodological and statistical considerations for using concept mapping are mentioned. The study concludes that concept mapping is a promising tool for theory articulation. Study limitations and opportunities for future research are also discussed. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]