Psychology The study of the way people think and behave is called psychology. The field of psychology has a number of sub-disciplines devoted to the study of the different levels and contexts of human thought and behavior. Social psychology, for example, deals with human thought and action in a social context, while physiological psychology is concerned with thought and behavior at the level of neurology. Another division of psychology, comparative psychology compares the thought and behavior of humans with that of other species. Abnormal psychology studies atypical thought and action. Psychology is an interdisciplinary science. Social psychology, for exam