This basic work on speech therapy and speech therapy provides a systematic and well-founded overview of the subject. In addition to the basics of diagnosis and therapy and a look at the clientele, the focus is on differentiated knowledge for theory-led practice. The main disorder phenomena are described in terms of their manifestation, diagnosis and therapy. The areas of responsibility and fields of action of speech therapists and speech therapists are outlined. Definitions, summaries and keywords in the margins ensure clarity and quick orientation.