This volume seeks to assemble various works on the 'tip-of-the-tongue state' and related phenomena.When the memory retrieval process breaks down, people wonder exactly why and how such a thing occurs. In many cases, failed retrieval is accompanied by a tip-of-the-tongue state, a feeling that an unretrieved item is stored in memory. Tip-of-the-tongue states are both universally experienced outside of the lab and readily produced in the lab, and therefore represent a unique opportunity to explore the nature of retrieval and its interaction with phenomenological experience. The study of tip-of-the-tongue states represents an important crossroads where cognitive psychology meets popular conceptions of mind and memory.When the memory retrieval process breaks down, people wonder exactly why and how such a thing occurs. In many cases, failed retrieval is accompanied by a tip-of-the-tongue state, a feeling that an unretrieved item is stored in memory. Tip-of-the-tongue states are both universally experienced outside of the lab and readily produced in the lab, and therefore represent a unique opportunity to explore the nature of retrieval and its interaction with phenomenological experience. The study of tip-of-the-tongue states represents an important crossroads where cognitive psychology meets popular conceptions of mind and memory.When the memory retrieval process breaks down, people wonder exactly why and how such a thing occurs. In many cases, failed retrieval is accompanied by a tip-of-the-tongue state, a feeling that an unretrieved item is stored in memory. Tip-of-the-tongue states stand at the crossroads of several research traditions within cognitive science. Some research focuses on the nature of the retrieval failure. Other research tries to determine what tip-of-the-tongue states can tell us about the organization of lexical memory that is, what aspects of a word we can recall when we are otherwise unable to do so. Still other research focuses on the natulS'