This definitve clinical reference comprehensively reviews the most advanced methods for assessing the person in pain. Empirically supported instruments and procedures are detailed, including self-report measures, observational techniques, psychophysiological measures, and more. Best-practice recommendations are provided for assessing the most prevalent pain sydromes and for working with children, the elderly, and people with communication difficulties. The book also weighs in on the limitations of existing methods and identifies key directions for future research. New to this edition: tighter organization with more concise chapters and a heightened focus on practical clinical issues; incorporates significant advances in knowledge about pain and pain syndromes; numerous new or refined assessment instruments and procedures, including applications of advanced imaging techniques; and chapter providing an integrated, comprehensive assessment approach for any type of chronic pain.