About O. Carl Simonton
Lived 1942 – 2009 (aged 66). O. Carl Simonton was an American psychologist, oncologist and radiologist.
O. Carl Simonton (June 29, 1942 – June 18, 2009) was a specialist in radiology and oncology most notable for his unproven cancer treatment methods. Medical health experts describe his therapy as dubious.
Physician Edward R. Friedlander, who investigated Simonton's techniques in depth, noted that although some patients found his approach helpful, his case histories are "very poor evidence" for the claim that his treatment controls tumours.
Psychologist Tomasz Witkowski devoted a whole chapter of his book Psychology Led Astray: Cargo Cult in Science and Therapy to Simonton and his method and concluded: "A deadly illness and its terminus are extreme situations; too difficult to be judged from the perspective of an outsider. However, when the process is joined by professionals, not only can we, but we should assess what they are doing. The effectiveness of psychotherapy according to the methods of O. Carl Simonton has, for almost forty years, not been verified in accordance with the standards applicable in science and medicine. The majority of trustworthy studies indicates that the descriptions of effectiveness in advertisements for the method are false. The sources invoked by its supporters do not account either for the position of the American Cancer Society, nor other critical studies(…)".
The American Cancer Society issued a statement entitled Unproven Methods of Cancer Management that summarized Simonton's methods by: "After careful study of the literature and other information available to it, the American Cancer Society does not have evidence that treatment with O. Carl Simonton's psychotherapy method results in objective benefit in the treatment of cancer in human beings".
Publications Simonton, O.C. & Simonton S.S., "Belief Systems and Management of the Emotional Aspects of Malignancy, The Journal of Transpersonal Psychology, Vol.7, No.1, (January 1975), pp.29-47. Getting Well Again (1992) The Healing Journey (2002)
Personal life Simonton married Stephanie Matthews in 1973, who had two kids named Sheryl and Shannon before they divorced. Simonton later married Karen, who had two kids named Chase and Elizabeth.
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Important facts
People in O. Carl Simonton's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped O. Carl Simonton's
Frequently asked questions
Who was O. Carl Simonton?
American oncologist (1942-2009)
When was O. Carl Simonton born?
O. Carl Simonton was born on 29 June 1942 in Los Angeles.
When did O. Carl Simonton die?
O. Carl Simonton died on 18 June 2009 in Agoura Hills.
What was O. Carl Simonton's occupation?
O. Carl Simonton was a psychologist, oncologist and radiologist.
What nationality was O. Carl Simonton?
O. Carl Simonton was American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). O. Carl Simonton. https://biography.guide/o-carl-simonton/
MLA: "O. Carl Simonton." Biography.guide, https://biography.guide/o-carl-simonton/.
Chicago: "O. Carl Simonton." Biography.guide. https://biography.guide/o-carl-simonton/.
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