Representative models of program evaluation are described by their approach to values, and categorized by empirical style: positivism versus humanism. The models are: social process audit; experimental/quasi-experimental research design; goal-free evaluation; systems evaluation; cost-benefit analysis; and accountability program evaluation. (CP)

New media, such as electronic mail and word processing, are playing increasingly important roles in communication activities, especially in organizational settings. This article reviews the process by which new media are diffused, and describes some characteristics of new media that have implications for evaluation research. (Author/BW)