This landmark work is indispensable for anyone studying anxiety or seeking to deliver effective psychological and pharmacological treatments. Integrating insights from emotion theory, recent advances in cognitive science and neuroscience, and increasingly important findings from developmental psychology and learning, David H. Barlow comprehensively examines the phenomena of anxiety and panic, their origins, and the roles that each plays in normal and pathological functioning. Chapters coauthored by Barlow with other leading experts then outline what is currently known about the classification, presentation, etiology, assessment, and treatment of each of the DSM-IV anxiety disorders. A definitive resource for researchers and clinicians, this is also an ideal text for graduate-level courses.