Processing of probabilistic information in weight perception and motor prediction

We studied the effects of probabilistic cues, i.e., of information of limited certainty, in the context of an action task (GL: grip-lift) and of a perceptual task (WP: weight perception). Normal subjects (n = 22) saw four different probabilistic visual cues, each of which announced the likely weight of an object. In the GL task, the object was grasped and lifted with a pinch grip, and the peak force rates indicated that the grip and load forces were scaled predictively according to the probabilistic information. The WP task provided the expected heaviness related to each probabilistic cue; the participants gradually adjusted the object’s weight until its heaviness matched the expected weight for a given cue. Subjects were randomly assigned to two groups: one started with the GL task and the other one with the WP task. The four different probabilistic cues influenced weight adjustments in the WP task and peak force rates in the GL task in a similar manner. The interpretation and utilization of the probabilistic information was critically influenced by the initial task. Participants who started with the WP task classified the four probabilistic cues into four distinct categories and applied these categories to the subsequent GL task. On the other side, participants who started with the GL task applied three distinct categories to the four cues and retained this classification in the following WP task. The initial strategy, once established, determined the way how the probabilistic information was interpreted and implemented.     

Sollen Psychoanalytiker Psychotherapeuten ausbilden?

With respect to the radical changes in psychotherapeutic education as a consequence of the Law for Psychotherapy that has been put into force, the author elaborates on political, medical and strategic aspects. It is of special interest whether psychoanalysts having had the “monopoly” of training in depth psychological therapy should further take responsibility for the training in and the development of this method. Meanwhile, other therapeutic schools are claiming depth psychological psychotherapy for themselves and they deny the essential role of psychoanalysis as a foundation of it. In addition, the psychoanalytic institutes themselves do not agree on this issue. A further aspect of the question is that of marketing strategies: in order to survive, it is for psychoanalytic institutes at a time of lessening interest in standard psychoanalytic training important to offer training in depth psychological therapy with its comparatively less expensive and less extensive curriculum. But the essential question remains: should psychoanalysts train psychotherapists and take responsibility for an independent depth psychological therapy, or not? The author calls for a separate profound education in depth psychology taught by psychoanalysts in order to maintain a positive atmosphere for psychoanalysis e.g. in clinical institutions. He agrees with the IPV that this would help to solve “the crisis of the psycho analysis”. Finally, some of the most important, unsolved questions referring to a separate and profound education in depth psychology are presented and possible solutions are offered. It is of crucial importance to take up again the discussion within the psychoanalytical associations and to adjust their medical as well as political attitude to the new ways depth psychology is taught at psychoanalytical institutes.