[Solved] An extraneous variable can be eliminated completely by holding it constant. Id: In psychoanalytic theory, the part of the psyche that is the source of instinctual impulses and demands for immediate satisfaction of basic needs. Ego: In psychoanalytic theory, the part of the personality structure that mediates between the demands of the id, superego, and reality, functioning as the executive control. Pornographic Video: Visual content intended to stimulate erotic feelings rather than aesthetic or emotional feelings. Superego: One of the three parts of the human psyche in Freudian psychoanalytic theory, representing the moral component, which internalizes societal norms and values.