Author: Monika Bartosiewicz-Niziołek, Polish Evaluation Society and the Jerzy Regulski Foundation in Support of Local Democracy, Warsaw, Poland (firstname.lastname@example.org)
Persons with various experiences in evaluation can understand the term “impact evaluation” in different ways. This article presents an explanation of “impact” in reference to the Logical Framework Matrix, evaluation criteria, and causality. Then, various designs of impact evaluation are described, such as experimental and quasi-experimental, theory-based, ruling out alternative explanations, case-based, and participatory ones. Regardless of the given approach, one of the crucial issues for measuring impact are organizational aspects, including planning and necessary resources. Although impact evaluation seems to be one of the most requiring, it brings valuable evidence on the attribution of a given intervention.
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