Explore the final lecture of Yale University's Introduction to Psychology course, focusing on treatment efficacy in clinical psychology and the fascinating field of positive psychology. Delve into the effectiveness of therapy and its various influences on patients. Discover the latest research on happiness, examining what contributes to well-being, how it differs across individuals and cultures, and its evolutionary purpose. Learn why people often struggle to predict what will bring them the most joy. Gain insights into the psychology of happiness and well-being through this 48-minute video lecture, which includes chapters on therapy efficacy, positive psychology, and adapting to happiness.