The study of human behavior is called psychology. This field examines various aspects of human thought, emotion, and action, exploring how individuals interact with one another and their environments. Psychology encompasses a wide range of subfields, including cognitive psychology, developmental psychology, social psychology, clinical psychology, and more. Researchers and practitioners study behavior through observational studies, experiments, and surveys to understand both normal and abnormal patterns. The insights gained from psychology can be applied in various areas, including mental health treatment, education, and marketing, making it a vital discipline in understanding human experience.