With its engaging color layout and easy to read writing style, A Guide to Communication Sciences and Disorders, Fourth Edition is designed for undergraduate students with an interest in entering the field of communication sciences and disorders. INTRO is an introduction to the professions of speech-language pathology and audiology and the underlying discipline on which they are based, communication sciences and disorders. The text provides essential information concerning a wide range of communication disorders found in children and adults. The structure of the book is consistent across chapters to assist beginning students in grasping new vocabulary and concepts. An introduction to each of the various disorders includes some of the fascinating historical background surrounding each disorder, as well as current theories. A portion of each chapter is dedicated to diverse and cultural aspects of communication disorders, as well as prevalence information about various communication disorders as found in English-speaking countries around the world, including Australia, Canada, the United Kingdom, the United States, and New Zealand.