This revised and updated volume in the Clinical Competence Series is a valuable resource for use in the care and treatment of individuals with articulation and phonological disorders. Covering articulation and phonological disorders that span client ages, populations, and settings, this text is ideal for both clinical use and in communication sciences programs. In addition to updating information from the first edition, the second edition adds two new chapters, providing an overview of speech and its disorders and addressing how children develop speech perception and production skills for communication. New to the Edition New Chapter 1: Foundations of Care, describes the social, linguistic, and biological foundations that underlie clinical care as described in this book. New Chapter 3: Speech Development, contains extensive discussion and clinically useful tables showing developmental milestones in speech perception and production, the connection between speech perception and production, and speech for purposes of communication. Updated references New appendices Revises section on distinguishing dialect from disorder and varieties of American English