Comprehensive guide to essential principles of psychology. Understanding psychological principles is essential for nurses because they work closely with patients from diverse backgrounds experiencing a wide range of emotional, mental, and behavioral challenges. Knowledge of psychology enhances nurses' ability to provide holistic care, connect with their patients, and navigate the complex emotional landscape of healthcare delivery. This book provides thorough coverage of psychology topics, teaching the foundational theories and concepts necessary for understanding human behavior. The material is clearly presented and systematically organized for learning important principles and relationships, providing comprehensive learning. From the early theories on human mind to the modern neuropsychology perspectives, readers will develop a better understanding of all major psychological theories, principles and approaches that elucidate multidimensional concepts of emotion, behavior and cognition. They will learn about historically significant psychology researchers, biological basis of human behavior, basic principles of consciousness and cognition, what drives human emotions and motivations, as well as how early childhood psychological development affects human behavior. The book also describes all major groups of psychological disorders and covers the foundations of social psychology. Experienced psychology and sociology instructors, researchers, and clinicians prepared this learning material to build knowledge and skills crucial for understanding psychology. Our editorial team reviewed and systematized the content for targeted and effective learning, so readers can significantly improve their understanding of the subject.