Highlighting the value of impact evaluation: enhancing informal science learning and public engagement theory and practice
King et al.  argue that ‘emphasis on impact is obfuscating the valuable role of evaluation’ in informal science learning and public engagement (p. 1). The article touches on a number of important issues pertaining to the role of evaluation, informal learning, science communication and public engagement practice. In this critical response essay, I highlight the article’s tendency to construct a straw man version of ‘impact evaluation’ that is impossible to achieve, while exaggerating the value of simple forms of feedback-based evaluation exemplified in the article. I also identify a problematic tendency, evident in the article, to view the role of ‘impact evaluation’ in advocacy terms rather than as a means of improving practice. I go through the evaluation example presented in the article to highlight alternative, impact-oriented evaluation strategies, which would have addressed the targeted outcomes more appropriately than the methods used by King et al. . I conclude that impact evaluation can be much more widely deployed to deliver essential practical insights for informal learning and public engagement practitioners.