A method for analyzing speech, developed at the Psychosomatic Clinic of the University of Giessen, is applied to a psychotherapeutic treatment. After a brief account of the method, the authors raise the question of whether automatic speech analysis can be used as a convenient instrument for the assessment of psychotherapy. A detailed case description is offered to enable the reader to relate the results of the speech analysis to the patient's personality structure. It becomes apparent that the data obtained yield valid generalizations pertaining to the interactive aspect of the therapy, as well as diagnostic, therapeutic, and technical considerations. The authors conclude with a critique of the method's deficiencies; further research might answer remaining questions.