The Routledge Handbook of Communication Disorders provides an update on key issues and research in the clinical application of the speech, language and hearing sciences in both children and adults. Focusing on areas of cutting-edge research, this handbook showcases what we know about communication disorders, and their assessment and treatment. It emphasizes the application of theory to clinical practice throughout, and is arranged by the four key bases of communication impairments: Neural/Genetic Bases Perceptual-Motor Bases Cognitive-Linguistic Bases Socio-Cultural Bases. The handbook ends with an integrative section, which looks at innovative ways of working across domains to arrive at novel assessment and treatment ideas. It is an important reference work for researchers, students and practitioners working in communication science and speech and language therapy.