While the Freudian approach has consisted in examining analytic relation in terms of the patient's transference to the analyst, the concept of intersubjectivity has changed the axis of analytic work. Hence, the interaction between the patient and the analyst has become its focus. According to T. Ogden (2004), the analytic third is the product of a dialectic common to the analytic couple. The past of the analyst is transformed parallel to the transformation of the past of the patient and this is realized through the experience situated in the potential space between the two. From the '50 on, W.R.Bion, H. Rosenfeld, H. Segal and later R. Money-Kyrle, B. Joseph, J. Sandler, M. Feldman, E. O'Shaugnessy, E. Bott-Sillius, R. Britton, J. Steiner have accorded a central place to projective identification in order to grasp the relation between patient and analyst.