Methodological review demonstrates the utility of qualitative approaches in social programs, highlighting evaluation's role in understanding rather than solely judging program impact.
`a very good book indeed... I have read and re-read many parts of the text... Wit, thoughtfulness, graceful style, and practical advice are well mixed... a welcome contribution to the maturing of evaluation into an interdisciplinary field whose function in describing and understanding social programs is as important as its role in explaining or judging those programs' -- Educational Evaluation and Policy Analysis
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Cordray et al. (1981) studied this question.
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