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Ronald Lindsay André "Ron" Langevin (born September 28, 1940) is a Canadian forensic psychologist at the University of Toronto. He is the founding editor of Annals of Sex Research, now titled Sexual Abuse: A Journal of Research and Treatment.[1]


Life and careerEdit

Langevin was born in Montreal and earned a Ph.D. in psychology from University of Toronto in 1970. He wrote materials for the Canadian Council for Research in Education before taking a position at the Clarke Institute of Psychiatry, where he worked with Kurt Freund.[citation needed]

Langevin argued against the effectiveness of reparative therapy in 1985.[2] He served as an expert witness in a sexual abuse trial in 1989.[3] In 1989 also, Langevin published findings suggesting a correlation between sex offenders and traumatic brain injury, though he suggested caution in the use of the findings, as half his subjects were alcohol abusers.[4]

He is director of Juniper Associates Psychological Services and is an Associate Professor in the Law & Mental Health program at University of Toronto. He has also published materials through Juniper Press. Langevin is a charter member of the International Association for the Treatment of Sexual Offenders (IATSO).[5]

Selected bibliographyEdit

  • Langevin R, Curnoe S. Psychopathy, ADHD, and brain dysfunction as predictors of lifetime recidivism among sex offenders. Int J Offender Ther Comp Criminol. 2011 Feb;55(1):5-26. Epub 2010 Feb 3. PMID 20130091
  • Langevin R, Curnoe S. Are the mentally retarded and learning disordered overrepresented among sex offenders and paraphilics? Int J Offender Ther Comp Criminol. 2008 Aug;52(4):401-15. Epub 2007 Aug 23. PMID 17717332
  • Langevin R, Langevin M, Curnoe S. Family size, birth order, and parental age among male paraphilics and sex offenders. Arch Sex Behav. 2007 Aug;36(4):599-609. PMID 17186126
  • Langevin R. Sexual offenses and traumatic brain injury. Brain Cogn. 2006 Mar;60(2):206-7. PMID 16646123
  • Langevin R, Curnoe S, Bain J. A study of clerics who commit sexual offenses: are they different from other sex offenders? Child Abuse Negl. 2000 Apr;24(4):535-45. PMID 10798842
  • Langevin R, Glancy GD, Curnoe S, Bain J. Physicians who commit sexual offences: are they different from other sex offenders? Can J Psychiatry. 1999 Oct;44(8):775-80. PMID 10566107
  • Langevin R, Wright P, Handy L (1988). The sex killer. Ann Sex Res Volume 1, Number 2, 263-301, doi:10.1007/BF00852801
  • Langevin R, Bain J, Wortzman G, Hucker S, Dickey R, Wright P. Sexual sadism: brain, blood, and behavior. Ann N Y Acad Sci. 1988;528:163-71. PMID 3421590
  • Langevin R, Ben-Aron M, Wortzman G, Dickey R, Handy L (1987). Brain damage, diagnosis, and substance abuse among violent offenders Behavioral Sciences & the Law Volume 5, Issue 1, pages 77–94, Winter 1987
  • Langevin R (1983). Sexual strands: understanding and treating sexual anomalies in men. Psychology Press, ISBN 978-0-89859-205-4
  • Paitich D, Langevin R, Freeman R, Mann K, Handy L. The Clarke SHQ: a clinical sex history questionnaire for males. Arch Sex Behav. 1977 Sep;6(5):421-36. PMID 921525
  • Paitich D, Langevin R. The Clarke Parent-Child Relations Questionnaire: a clinically useful test for adults. J Consult Clin Psychol. 1976 Jun;44(3):428-36. PMID 932273
  • Freund K, Langevin R, Wescom T, Zajac Y. Heterosexual interest in homosexual males. Arch Sex Behav. 1975 Sep;4(5):509-18. PMID 1191003
  • Freund K, Langevin R, Zajac Y. Heterosexual aversion in homosexual males. A second experiment. Br J Psychiatry. 1974 Aug;125(0):177-80. PMID 4472133
  • Freund K, Langevin R, Zajac Y, Steiner B, Zajac A. The trans-sexual syndrome in homosexual males. J Nerv Ment Dis. 1974 Feb;158(2):145-53. PMID 4813925
  • Freund K, Langevin R, Cibiri S, Zajac Y. Heterosexual aversion in homosexual males. Br J Psychiatry. 1973 Feb;122(567):163-9. PMID 4714830


  1. ^ Maletzky, Barry M (1991). Langevin RL Editorial: ASR and ATSA: Finally together Sexual Abuse: A Journal of Research and Treatment. Volume 4, Number 1, 5-6, doi:10.1007/BF00850136
  2. ^ Crosby, Louise (February 15, 1985). Gay counseling urges acceptance of homosexuality. Ottawa Citizen
  3. ^ Kenna, Kathleen Women sex abusers are 'extremely rare' sex abuse trial told. Toronto Star
  4. ^ Staff report (January 23, 1989). Sex Abuse Linked to Brain. Los Angeles Times
  5. ^ IATSO: Charter members.

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