This article examines the development of Mary Koss’s influential Sexual Experiences Survey and defends her then-controversial interpretive choice to endorse a broad-scope definition of rape. Koss’s choice was informed by an empirical recognition of how unjust power dynamics could confound measurement strategies. By adopting a feminist standpoint, Koss and her colleagues recognized how many measurement procedures implicitly disempowered respondents’ capacity to express inquiry-relevant data. Ultimately, the iterative development of a valid and reliable measurement system is compatible with, and quite comparable to, the feminist project of identifying how gendered relations of power enable the persistence and concealment of sexual violence.