With his concept of projective counteridentification Leon Grinberg made a valuable contribution to the general theory of countertransference or, as he deems it as it is concerned with "the real effects produced in the object by the peculiar use of projective identification which comes from regressive personalities". Grinberg's fundamental idea is that in the phenomenon of projective counteridentification the analyst does not participate with his conflicts but remains dominated by the patient's projective process. Money-Kyrle wrote a paper on countertransference, where he introduced the concept of normal countertransference—that is, something that presents itself regularly and intervenes in its own right in psychoanalytic process. In the normal countertransference, the analyst assumes the role of the parent, projected by the child; on the other hand, he can understand the role of the child not only through that parental position, but also on the basis of a projective identification of his infantile ego into the patient, mobilized by his tendency to effect reparation.