Filip Loncke, PhD, is a professor at the University of Virginia. For more than three decades he has practiced and conducted research in augmentative and alternative communication (AAC). Dr. Loncke is a past president of the International Society for AAC (ISAAC). He has lectured and taught AAC courses in the United States and Europe since the early 1990s. As reflected in this volume, his research interest is in cognitive and psycholinguistic processes involved in atypical communication.