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Personality Traits of Mentally Disordered Males Who Committed Homicide

M Khalili, B Ranggar, A Ahmadi, I Ismaieli, F Mousavi, SM Saberi




Background: The relationship between personality traits and criminal behavior has not been sufficiently investigated. This study was done to determine the personality traits in a group of criminals who have committed homicide.

Methods: This study was conducted to compare the personality traits in three groups of people in Tehran during 2014. The statistical population was examined 3 communities; first, forensic psychiatric patients; Second, people who accused homicide without psychiatric diagnosis; and, matched group (with no diagnosis and crime). The study sample included 121 males; they have been divided into 3 groups: psychiatric patients who have committed homicide (n=41), murderers without any major psychiatric disorder (n=40) and control group which includes non-committed and non-patient (n=40). The cases were evaluated by a short form of Neo questionnaire.

Results: There was a significant difference between the groups in terms of personality traits, which included neurosis, extroversion, agreeableness and conscientiousness. The most significant difference was in extroversion and conscientiousness variables. Psychiatric patients’ committed homicide showed higher scores than those of non-patient and the control group. Psychiatric patients had lower scores in extroversion, agreeableness and conscientiousness characteristics in comparison with the other two groups.

Conclusion: Psychiatric patients who have committed homicide have more Irascible traits. Non-patient cases who committed homicide have a tendency to introspection and egocentrism and they are socially compatible in comparison with patient groups. These subjects are among dispassionate ones. The results of this study failed to demonstrate a significant difference between non-patient cases who have committed homicide and the control group.


Homicide, Murder, Psychiatric Disorders, Personality Traits


Large M, Smith G, Swinson N, Shaw G, Nielssen O. Homicide due to mental disorder in England and Wales over 50 years. The British Journal of Psychiatry. 2008;193(pt2):130-3.

Vinkers DJ, De Beurs, E, Barenderget, M, Rinne T, Hoek HW. The relationship between mental disorders and different types of crime. Criminal behavior and mental health 2011;21(pt5):307-20.

Fazel S, Grann M. Psychiatric morbidity among homicide offenders: a Swedish population study. Am J Psychiatry. 2004;161:2129–31.

WHO. Global Consultation on Violence and Health. Global status report on violence prevention. Violence: a public health priority. Geneva, World Health Organization 2014 (document WHO.EHA.SPI.POA.2).

Coid J, Yang M, Roberts A, Ullrich S, Moran P, Bebbington P, et al. Violence and psychiatric morbidity in a national household population – a report from the British Household Survey. Am J Epidemiol. 2006;164:1199–208.

Raine A. Biosocial Studies of Antisocial and Violent Behavior in Children and Adults: A Review1. Journal of Abnormal Child Psychology. 2002;30(4):311–26.

Roberts A, Zgoba K, Shahidullah Sh. Recidivism among four types of homicide offenders: An exploratory analysis of 336 homicide offenders in New Jersey. Aggression and Violent Behavior. 2007;12:493–507.

Woodward M1, Nursten J, Williams P, Badger D. Mental disorder and homicide: a review of epidemiological research. Epidemiologia¬ e Psichiatria Sociale. 2000;9(pt3):171-189.

Wolf A, Gray R, Fazel S. Violence as a public health problem: An ecological study of 169 countries. Social science and medicine. 2014;104:220-227.

Elgar FJ, Aitken N. Income inequality, trust and homicide in 33 countries. European Journal of Public Health. 2010;21(02):241–6.

Fabian J. Neuropsychological and neurological correlates in violent and homicidal offenders: A legal and neuroscience perspective. Aggression and Violent Behavior .2010;15:209–223.

Serafim A, Barros D, Castellana GB, Gorenstein C. Personality traits and violent behavior: A comparison between psychopathic and non-psychopathic male murderers. Psychiatry Research. 2014;219:604–8.

Feist J, Feist G. Theories of personality 8th ed. Humanities & Social Sciences. 2013;10-5.

Megargee E. Undercontrolled and overcontrolled personality types in extreme antisocial aggression, Psychological Monographs: General and Applied. 1966;80(pt3):1-29.

Blackburn R. Am empirical classification of psychopathic personality. Br J Psychiatry. 1975;127:456-60.

McCrae R, Costa P. A contemplated revision of the NEO Five-Factor Inventory. Personality and Individual Differences. 2004;36:587–96.

KiaMehr J, Normalization of the Neo five-factor inventory and structure of emotion among students of humanities faculty in Tehran University [dissertatin]. Allameh Tabatabaei University of Tehran, Faculty of Education and Psychology. 2002.

Basoglu C, Oner O, Ates A, Algul A, Bez Y, Ebrinc S, et al. Temperament traits and psychopathy in a group of patients with antisocial. Comprehensive psychiatry. 2011;607-12.

Aggarwal A , Vaish S, Sharma D.k, Sushil S, Usman N, Sudarsanan S. A Study of personality profile and criminal behavior in substance abusers. Ind Psychiatry J. 2015;24(1):35-9.

Hollin R. Psychology and Crime An introduction to criminological psychology. 2th ed. Routledge. 2002;189-239.

Eysenck HJ. Crime and personality. In: Feist J, Feist G. Theories of personality 8th ed. Humanities and Social Sciences. 2013;470-79.

Brookman F. Killer decisions: The role of cognition, affect and ‘expertise’ in homicide, Aggression and Violent Behavior. 2015;20:42–52.

Hare RA. research scale for the assessment of psychopathy in criminal populations. Personality and Individual Differences.1980;1:111-9.

Raine A. A psychometric assessment of Hare's Checklist for psychopathy on an English prison sample. British Journal of Clinical Psychology. 1985;24:247-258.

DOI: https://doi.org/10.22037/ijmtfm.v7i2(Spring).14594