This text is designed to meet the needs of contemporary nursing by translating biopsychosocial theory into clinical practice. The predominant underlying concept is the interrelatedness of biological, psychological and sociocultural etiologies with interventions and desired patient outcomes. The focus of the text is the professional roles and practice parameters of the nurse within the continuum of care-delivery settings, the increasing importance of biologic intervention, especially psychopharmacology, understanding DSM-IV classification and terminology, development of assessment skills and development of problem-solving and critical thinking abilities. Biopsychosocial art is used throughout to illustrate complex interrelationships. Special features include: case study-based nursing care plans for major diagnostic disorders; therapeutic and non-therapeutic dialogues; key diagnostic characteristics tables; research utilization boxes, decision trees, psychoeducation checklists and a colour insert using PET scans to illustrate the biologic nature of psychiatric disorders. Each chapter includes key concepts, a summary of key points and critical thinking challenge questions.