This volume examines the ramifications of individual differences in therapy outcomes for a wide variety of communication disorders. In an era where evidence-based practice is the clinical profession's watchword, each chapter attacks this highly relevant issue from a somewhat different perspective. In some areas of communication disorders, considering the variance brought by the client into the therapeutic 'mix' has a healthy history, whereas in others the notion of how individual client profiles mesh with therapy outcomes has rarely been considered. Through the use of research results, case study descriptions and speculation, the contributors have creatively woven what we know and what we have yet to substantiate into an interesting collection of summaries useful for therapy programming and designing clinical research.