The term 'EGO' is a three-letter solution to the crossword puzzle clue 'Psychology Topic'. EGO is a term used in psychoanalytic theory to refer to a person's sense of self-importance and identity. It is often used to describe the conscious mind, which is responsible for decision-making and rational thought. In Freudian psychology, the EGO is seen as the mediator between the id, which is the unconscious desires, and the superego, which is the moral conscience. The EGO is also responsible for managing the demands of reality and the environment.