Mixed methods in evaluation have the potential to enhance the credibility of evaluation and the outcomes of evaluation. This issue explores advances in understanding mixed methods in philosophical, theoretical, and methodological terms and presents specific illustrations of the application of these concepts in evaluation practice. Leading thinkers in the mixed methods evaluation community provide frameworks and strategies that are associated with improving the probability of reaching the goals of enhanced credibility for evaluations, the evidence they produce, and the actions taken as a...

While improvement science has experienced a surge of interest over the past 30 years, applications of it are rare in the evaluation literature.

This issue promotes the cross-fertilization of ideas, techniques, and tools between evaluation and improvement science. There are at least four areas where this cross-fertilization is particularly relevant: learning from error, examining variation, appreciating context, and focusing on systems change. This volume considers:

• the conceptual similarities and distinctions between improvement science and evaluation;
...