Beebe and Buckwalter made the surprising discovery that people are more inclined to attribute knowledge when norms are violated than when they are conformed to. The epistemic side-effect effect is the analogue of the Knobe effect. ESEE was replicated in a number of experiments. It was also studied under various conditions. We have carried out a meta-analysis of research on ESEE. The results suggest that ESEE is a robust finding but its magnitude is highly variable. Two study-level covariates influence its (...) size: the subject of the knowledge attribution and the type of norm that is violated or complied with. The effect size is not influenced, however, by the manipulation of chances, by whether the story is about a side effect or not, by language or by question phrasing. The impact of the Gettierization of the story is marginally significant. (shrink)