Liberman uses communication theory, as well as other auxiliary sciences, to study changes in psychoanalytic theory. He uses two metaphorical images chosen by Freud to illustrate the nature of analytic communication, the telephone and the chess game, to conclude that psychoanalysis has a second investigative task, the analytic dialogue and the study of psychoanalytic processes. The first task, although it is not specifically defined, must refer to the study of the unconscious. The