They set "introjection" against "assimilation". He elaborated three major concepts coined by Freud and Ferenczi&colon; projection, introjection, internalization. The effect of introjection on object relations is equally important. This was opposed to Freud's notion that only introjection takes place in early experience. Projection has been described as an early phase of introjection. Tony Oursler Introjection&colon; Mid-career survey 1976-1999. In Gestalt therapy, the concept of "introjection" is not identical with the psychoanalytical concept. The standard contact-boundary resistances in Gestalt theory were "confluence", "introjection", "projection" and "retroflection". "Introjection" is the passive acceptance of other people's ideas.