<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The id, ego and super-ego are three distinct, yet interacting agents in the psychic apparatus defined in Sigmund Freud's structural model of the psyche . </P> <P> The three parts are the theoretical constructs in terms of whose activity and interaction our mental life is described . According to this Freudian model of the psyche, the id is the set of uncoordinated instinctual trends; the super-ego plays the critical and moralizing role; and the ego is the organized, realistic part that mediates between the desires of the id and the super-ego . </P>

Who argued that the psyche contained three components called the id ego and super-ego