The fourth edition of this seminal book, guided by the APA Ethics Code, shows psychologists how to achieve high standards of ethical practice in their everyday work. This edition offers an enhanced focus on social justice as an ethical responsibility, expanded guidelines related to healthcare technologies, and greater emphasis on psychologist self-care. With their positive, proactive approach, Samuel Knapp and Randy Fingerhut demonstrate how to reach beyond the minimal ethical requirements in clinical practice, research, education, training, forensic psychology, and consultation. Through case examples they explore ethical dilemmas that psychologists often encounter around issues including informed consent, confidentiality, maintaining competence, and protecting the welfare of clients and society at large. The authors present three models to guide psychologists: the ethics acculturation model for balancing personal and professional ethics; the five-step decision-making model for navigating complex ethical quandaries; and the quality enhancement model for managing risk, particularly with patients who may harm themselves or others. Psychologists will learn how to collaborate with and empower patients, research subjects, students, and others by ensuring that all are actively engaged in ethical decisions.