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The Dark Side of Personality

Social life entails countless situations in which people have to trust each other. From mundane family matters to profane issues such as trade negotiations among world leaders in a conflicted globalized world — all require the trust and the trustworthiness of the involved individuals.

But how do individuals with antisocial personality traits behave in such circumstances? A new study published in Proceedings of the National Academy of Sciences by an international team of behavioral economists and social psychologists sheds light on the matter.

Trust and sanctions

The study shows that antisocial individuals have little trust in others unless they have the chance to sanction them for betraying their trust. If that chance exists, they harshly punish untrustworthy behavior.

At the same time, these individuals behave very untrustworthily themselves and betray the trust of others if they do not fear being sanctioned. Overall, these individuals exhibit a specific combination of behaviors and beliefs that indicates an assumption that others share their antisocial worldview.

Extracting the antisocial personality profile

Participants in the study first completed a series of personality questionnaires from which the researchers extracted an antisocial personality profile that was associated with Machiavellianism, a lack of empathy, and high levels of financial and social risk taking.

When interacting in situations requiring trust and trustworthiness, individuals with this profile stood out by showing the behaviors described above.

Antisocial at every stage

Jan Engelmann, from the University of Amsterdam, said:

Assuming a shared worldview

Individuals with antisocial traits adapted strategically to the absence versus presence of sanctions, and in doing so managed to earn significantly more than others. Here, the persistent and unique response to punishments seen among antisocial individuals suggests that they assume that their interaction partners share their antisocial worldview and adapt accordingly.

These findings confirm that for certain people, the ability to attribute mental states to others (referred to as “theory of mind” by social neuroscientists) may be influenced strongly by their own personality.

Provided by: University of Amsterdam [Note: Materials may be edited for content and length.]

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Troy Oakes
Troy was born and raised in Australia and has always wanted to know why and how things work, which led him to his love for science. He is a professional photographer and enjoys taking pictures of Australia's beautiful landscapes. He is also a professional storm chaser where he currently lives in Hervey Bay, Australia.

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