title: Defence, displacement and the ego's algebra.
mesh_terms: D003674:Defense Mechanisms; D004208:Displacement, Psychological; D004328:Drive; D004532:Ego; D006801:Humans; D007062:Identification, Psychological; D008960:Models, Psychological; D011385:Projection; D011574:Psychoanalytic Theory; D012043:Regression, Psychology; D012094:Repression, Psychology; D012649:Self Concept; D013359:Sublimation, Psychological