The transposition in fantasy of an object or any other source of pleasure that is usually outside the subject to a position inside the subject. For example, the child may perceive the strength of its father or kindness of its mother as agreeable attributes and unconsciously incorporate these into its ego and superego. Consequently, if one or other parent dies, the work of mourning the subject enters into is in part a kind of mourning for the loss of a part of the self too. The concept was conceived as the opposite of the notion of projection, by Freud, Sigmundâs friend and fellow psychoanalysis Sandor Ferenczi in 1909; it was adopted by Freud himself in 1915. The concept is central to the work of Klein, Melanie, though she restricts its use to the discussion of objects.