Much work in relevance theory relies on the kinds of method and data familiar to linguistic philosophers: essentially introspection and native speaker intuitions on properties such as truth conditions, truth values, what is said, etc. Recently, however, relevance theorists have been at the forefront of a newly-emerging research field, experimental pragmatics, which aims to apply the empirical techniques of psycholinguistics to questions about utterance interpretation. Over the last few years, this new research methodology has thrown up interesting and sometimes surprising insights into the psychological processes underlying human communication and comprehension, some of which are discussed in this article.