Author: Brandon A. Weber / Source: Big Think

Aside from Hannibal the Cannibal, what’s the first thing that comes to mind when you hear that someone is a “psychopath”?
A study was recently conducted wherein records regarding 5,500 psychopaths in the United States and around 2,000 in the Netherlands were looked at and divided into qualifications of what their primary symptoms were.
What researchers found after using the Psychopathy Checklist-Revised (PCL-RA-Hare, 2003) is rather fascinating: In the United States, the psychopaths studied showed predominately callousness and a lack of empathy, whereas the Dutch patients scored much higher in irresponsibility and a “parasitic lifestyle” than the U.S. patients.
An article published in Journal of Abnormal Psychology refers to the use of network analysis to complete the study.
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