Drug studies are often cited as the best exemplars of evaluation design. However, many of these studies are seriously biased in favor of positive findings for the drugs evaluated, even to the point where dangerous effects are hidden. In spite of using randomized designs and double blinding, drug companies have found ways of producing the results…

Chelimsky, former head of the Program Evaluation and Methodology Division of the General Accounting Office, suggested that advocacy by evaluators destroys their credibility. Evaluators should, this author argues, be advocates for democracy and the public interest, with the question being how explicitly and how defensibly. (SLD)

An optimistic view of the potential of evaluation to be a force for social improvement is presented. The most important unfinished task for evaluation may be to expand the logic of value judgments. In addition, the social usefulness of evaluation will depend on its credibility and the professionalism of evaluators. (SLD)

Discusses the following aspects of educational evaluation: (1) structural changes; (2) conceptual changes; (3) mixed methods and unraveling consensus; (4) utilization of findings; (5) the role of values; and (6) the role of politics. Discusses how evaluation moved from monolithic to pluralistic, reflecting the change from consensus to pluralism in…