A new study of inmates has found that grandiose narcissistic traits are closely linked to psychopathy, mediated by manipulative strategies, with the connection appearing strongest among incarcerated women. The research appears in Psychology, Crime & Law and sheds light on how Dark Triad traits interact under the pressures of prison life.
The Dark Triad framework groups three aggressive, self-centred traits: narcissism, characterised by an inflated sense of self-importance; Machiavellianism, a calculating and cynical approach to others; and psychopathy, marked by emotional coldness, moral disengagement and a lack of empathy. In everyday life these traits are related but distinct, psychologists say, but the prison environment can fuse them into active survival strategies.
In restrictive settings like prisons, where resources are scarce and informal hierarchies govern access to privileges, overt aggression can invite sanctions. Consequently, inmates often rely on covert manipulation to protect their social position and secure resources.
The researchers behind the study— Gizell Green of the Max Stern Yezreel Valley College in Israel, together with Alena Lochmannová and Ondřej Kolář of the Police Academy of the Czech Republic—sought to understand how Narcissism, Machiavellianism and Psychopathy interact inside custody. They proposed that an entitlement-driven narcissism does not automatically yield psychopathy; instead, a mediated pathway through calculated manipulation might connect the two, and they aimed to see if this path operates differently for men and women in prison.
To test their ideas, the team surveyed 344 adults serving time in six Czech prisons, comprising 205 women and 139 men. Participants completed a demographic questionnaire and the Dirty Dozen psychological assessment, which measures the three Dark Triad traits on a twelve-item scale. To protect anonymity and prevent staff from linking answers to individuals, responses were collected in a locked box.
Analyses controlled for background factors such as age, marital status and number of children, since these can influence criminal trajectories and baseline personality expression.
The findings showed strong associations among all three dark traits within the prison sample. Narcissism was robustly linked to higher Machiavellian tendencies, and both narcissism and Machiavellianism directly predicted higher levels of psychopathy.
In outlining the causal loop, the researchers identified Machiavellianism as a psychological bridge. Narcissistic desires for dominance and admiration appear to translate into psychopathic callousness partly through calculating and manipulative strategies. In the prison context, manipulation functions as a practical tool to secure resources without exposing vulnerability, and repeated strategic behaviour can foster the emotional detachment associated with psychopathy.
Regarding gender differences, the modelling did not permit the indirect pathway—from narcissism to psychopathy through manipulation—to vary by gender, so it was treated as the same for men and women. However, the direct link between narcissism and psychopathy did differ by gender, with incarcerated women showing nearly twice the strength of this direct association compared with incarcerated men.
In women’s prisons, a grandiose sense of entitlement is more likely to be paired with severe interpersonal hostility and emotional coldness. Female offenders exhibiting pronounced narcissistic traits are interpreted as representing a more extreme deviation from traditional gender expectations, potentially signalling a deeper personality pathology closely aligned with psychopathy.
For practice, the study offers guidance for correctional staff managing risk and rehabilitation. It suggests assessment protocols should avoid treating high scores on Dark Triad tests as a single, undifferentiated warning sign. Recognising how pursuit of status translates into exploitative tactics can help staff identify inmates who might resort to coercive behaviour, allowing rehabilitation programmes to target these specific manipulative strategies rather than focusing solely on general rule compliance.
The researchers caution that the data were collected at a single time point, so the study cannot establish a definite sequence of cause and effect. It remains possible that the prison environment triggers manipulation, which then unmasks latent narcissistic or psychopathic tendencies. The absence of a comparison group from outside the prison system means it is unclear whether this blend of traits is unique to custodial life.
The psychological survey used was brief and might not capture the full range of psychopathic behaviours. Prisoners may also tailor responses to protect their reputations, even when answers are anonymous. The authors suggest that future work should incorporate longer assessments and review official behavioural records, and consider cross-national comparisons to understand how different prison cultures shape antagonistic behaviour.
The study, “The dark path to psychopathy, Machiavellianism as a mediator of the narcissism–psychopathy link among incarcerated men and women: a moderated mediation analysis,” was authored by Gizell Green, Alena Lochmannová and Ondřej Kolář.
