Despite a general consensus that the mental health field is shifting from categorical toward dimensional diagnosis, important questions remain about exactly how this transition should occur--both practically and conceptually. This book brings together leading scholars to discuss how personality is related to psychopathology, how this changes our understanding of mental disorders, how dimensional models can be applied in varied clinical settings, and implications for training and research. The volume is uniquely structured to address 15 core challenges identified by the editors. Within each chapter, two author teams weigh in with different perspectives on the questions posed, offering a window into critical debates at the cutting edge of clinical science and practice.