Now in its ninth edition, the widely-used Speech Correction: An Introduction to Speech Pathology and Audiology continues to serve both students and clinicians as the classic introduction to communication disorders. Charles Van Riper's inimitable easy-to-read style, clinical focus, and emphasis on the person with the disability has been preserved and updated by his close friend and colleague, Robert Erickson. Together, they have incorporated current research and new techniques, while retaining the accuracy, comprehensiveness, and conversational style that made previous editions so successful. The new Ninth Edition continues to describe the nature, causes, and treatment of the major speech, language and hearing disorders but has the expanded coverage of normal language development and professional issues that users have been asking for. As always, many concrete and practical examples of clinical applications are presented, bringing meaning to the disorder areas. Charles Van Riper's style, along with Erickson's research and organization, will continue to capture the mind and the spirit of the student as the authors' love and appreciation for the profession shine through the material presented.