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Psychopaths display a lack of conscience. Another characteristic is that they have a certain level of superficial charm. Because of these conditions as well as being self-serving and manipulative in nature, they often do very well in both business and politics.
The technical term for psychopathy -- as listed in the Diagnostic and Statistical Manual of Mental Disorders (DSM) -- is antisocial personality disorder or ASPD. The term sociopath is also often applied to psychopaths. The media and the general public often use these three terms in the following contexts:
- "Antisocial" is usually applied to a person -- often an adolescent -- who has a difficult time fitting in with society. People with autism spectrum disorders like Asperger's syndrome were once thought to have ASPD because of their inability to easily join in with groups. Also, people with schizoid personality disorder were once considered to have ASPD because they actively seek to remove themselves from society.
- "Sociopath" is usually applied to those diagnosed with ASPD based on behavioral traits alone.
- "Psychopath" is usually applied to those diagnosed with ASPD based on behavioral, affective, and personality traits.
However, it should be noted that to most professional psychologists and psychiatrists, the three terms are synonymous, though some have argued that psychopathy should be a separate disorder.. Psychopathy is generally regarded to be a neurobiological disorder whereas Antisocial personality disorder (sociopathy) is considered to be the result of abuse or trauma, like narcissistic personality disorder which is correlated with psychopathy in the Diagnostic and Statistical Manual of Mental disorders (DSM).
 Hare psychopathy checklist
Canadian psychologist Robert D. Hare has developed a check list of personality traits that are common to most psychopaths. The Psychopathy Checklist-Revised (PCL-R) is as follows:
- Factor 1 -- Personality "Aggressive narcissism"
- Glibness/superficial charm
- Grandiose sense of self-worth
- Pathological lying
- Lack of remorse or guilt
- Emotionally shallow
- Callous/lack of empathy
- Failure to accept responsibility for own actions
- Factor 2 -- Case History "Socially Deviant Lifestyle"
- Need for stimulation/proneness to boredom
- Parasitic lifestyle
- Poor behavioral control
- Promiscuous sexual behavior
- Lack of realistic, long-term goals
- Juvenile delinquency
- Early behavioral problems
- Revocation of conditional release
- Traits not correlated with either factor
- Many short-term marital relationships
- Criminal versatility
Surveyors assign number values to the above traits.
- Does not apply = 0
- Somewhat applies = 1
- Fully applies = 2
If a person scores more than 20 points, beware.
 Other individuals professionally diagnosed as psychopaths (or sociopaths)
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- Jack Abbott
- Ian Brady
- Anders Behring Breivik
- Ted Bundy
- Emmanuel Constant
- Diane Downs
- John Wayne Gacey
- Stephen Griffiths
- Karla Homolka
- Kim Jong Il
- Charles Manson
- Harold Shipman
- Episode #304 (9 May 2011) of the Skeptics Guide to the Universe contains an interview with Jon Ronson, author of The Men Who Stare at Goats and The Psychopath Test
- ↑ 1% of the population and 25% of prisoners. (NOTE: In her 2005 book The Sociopath Next Door: The Ruthless Versus the Rest of Us, psychologist Martha Stout claims that the number of psychopaths at large in society is closer to 4%.)
- ↑ Being "schizoid" has no relation to schizophrenia. Basically, it's the desire to live the life of a hermit.
- ↑ HelpingPsychology:Sociopaths vs. Psychopaths
- ↑ See the Wikipedia article on Hare Psychopathy Checklist.