We examined whether epistemic beliefs predict students' evaluation of documents. Undergraduates read two texts on climate change. Participants judged the trustworthiness of each text and then indicated the criteria for their rating. We found that readers who believe strongly in relying on personal interpretations rather than on authorities trusted both documents less and used the document's content or their own opinion as criteria for judging trustworthiness. We also found that readers who believe that knowledge claims should be critically evaluated through logic and rules rated the science text as more trustworthy and used the criteria of their own opinion, author and content more than readers who believe in relying on their own experiences. These effects hold true while controlling for readers' prior knowledge and text comprehensibility. (Contains 6 tables.)