This book assembles a group of researchers to discuss the origins, development, and outcomes of extreme fear and shyness. By selecting the foremost experts from disparate fields, the editors provide a thorough and timely examination of the subject and present state-of-the-art research for psychologists, neuroscientists, and clinicians interested in the development and outcome of these emotions in mental health. The book is divided into three parts. Part I investigates the development of fear and shyness in childhood; Part II examines the endocrine and neural bases of fear; and Part III provides clinical perspectives. This is one of the only books which covers the development and outcomes of extreme fear and shyness, explains the basic neuroscience of fear, and documents the clinical outcomes of social phobia.