In spite of the scarcity of empirical studies of evaluation, such studies are critical to development of evaluation theory. Illustrative examples are given of studies of evaluation practice that operationalize theory. Although practitioners should continue public reflection, they must also focus on the independent and empirical study of…

Continuing the interchange of ideas about evaluation methodology, the authors argue the advisability of using the entire array of methods to produce useful and persuasive findings. There is, ultimately, a truth to be sought, but no one approach has a monopoly on finding it. (SLD)

The future of program evaluation is bright if evaluators do not ignore their roots in quantitative research. The current interest in qualitative approaches and the call for a "fourth generation" in evaluation should not override training in quantitative research. Qualitative research should complement, rather than replace, traditional…