The diagnostic apparatus of a psychoanalytical policlinic (the clinical department of the Sigmund Freud Institute at Frankfurt) is based on the whole body of psychoanalytic knowledge, and an endeavour is made to put the tool of psychoanalytic technique to optimal effect in all situations whenever the psychoanalyst meets the patient. Thus not only is the underlying meaning of the patient's verbal communications interpreted, but also certain unconscious psychological phenomena are observed directly—phenomena owing their 'gestalt' to processes of integration of perceptions including the verbal and behavioural communications of the patient as well as his transference manifestations. The final evaluation of the analytical findings is made by using structural, diagnostic and prognostic viewpoints and by employing further diagnostic methods. A case report is given for illustration.