Abstract
AbstractThe conflicting interests of evaluators are biasing the findings of some evaluations and experiments, even technically rigorous studies. One improvement would be to emphasize evaluator and investigator conflict‐of‐interest threats in conceptions of validity. Such discussions could suggest ways to assess and avoid conflicts of interest. I explore the possibilities in one highly regarded framework, the Campbellian conception of experimental validity. However, all evaluations and experiments, whatever their methods, are vulnerable, and all conceptions of validity should address such threats. © Wiley Periodicals, Inc., and the American Evaluation Association.
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