The purpose of an evaluation, its methodology and design, and the data that evaluators generate represent programs and stakeholders in particular ways. In the evaluation described in this article, the author faced making extensive methodological changes to an evaluation. In the process, she considered and reflected on the implications of these changes for the stakeholders involved in the program and the evaluation. What was her responsibility? To help her answer this question, the author read through and reflected on the "Guiding Principles for Evaluators" (2004) by the American Evaluation Association (AEA) at critical and periodic points during the evaluation, using them to "sensitize herself to critical domains relevant to her work." In the case example presented in this article, the author demonstrates when the guiding principles were helpful and not helpful in navigating the methodological changes. She identifies some of the guiding principles that were beneficial at particular points in the process. The author concludes with a discussion of how Guiding Principle Respect for People D.4 was particularly salient during the entire evaluation.