The author describes the effects of Erhard Seminars Training (est) on 67 patients--49 who took est during the course of psychotherapy with him and 18 who were seen for evaluation, consultation, or treatment after having taken est. Responsiveness to est was assessed in terms of individually predefined psychodynamics and treatment goals. Of the 49 patients who took est during therapy, 30 were judged to show some positive response and 19 were rated unchanged. The author believes that est often has a strong influence toward psychotherapeutic movement in patients with good ego strength who are motivated to change.