Psychopaths don't have a specific IQ; research shows a weak link, with many having average or even below-average intelligence, contrary to the "evil genius" trope, though some high-functioning individuals in careers may possess higher IQs, while those in prison often show lower scores, highlighting that psychopathy exists across different intellectual levels and doesn't guarantee genius.
Indeed, recent research on the relationships between intelligence measures and the Psychopathy Checklist Revised (PCL-R: Hare, 2003) indicates that the association is generally weak, and Hare and Neumann (2008) concluded that there is little reason to believe that psychopathic individuals possess superior intelligence.
Studies have suggested that serial killers generally have an average or low-average IQ, although they are often described, and perceived, as possessing IQs in the above-average range. A sample of 202 IQs of serial killers had a median IQ of 89.
The range of Full Scale IQ's for this group of 112 subjects was from 64 to 135, with a mean IQ of 100.1 and a standard deviation of 15.3, these values being almost identical with Wechsler's <"> standardization sample.
Evaluating the available research, Olderback and her coauthors found evidence that psychopaths may actually lack the intellectual ability they need to quickly and easily lie because they don't have the emotion-sensing skills needed to identify how other people are feeling.
Although severe psychopathy affects just about 1% of people, some research suggests that close to 30% of us have some level of psychopathic traits. And we may even know people who fall under this broad umbrella. So what do researchers know about the causes of psychopathy?
From the table given above, it can be interpreted that there is no significant correlation between IQ and Narcissism (r=-0.004, P>0.05).
The vast majority of people in the United States have I.Q.s between 80 and 120, with an I.Q. of 100 considered average. To be diagnosed as having mental retardation, a person must have an I.Q. below 70-75, i.e. significantly below average.
As shown in the graph below, the prevalence of violent behavior dropped steadily with increasing IQ: 16.3% of individuals with IQs in the 70-79 range reported violent behavior, compared with just 2.9% of those with IQs of 120-129.
A normal IQ typically falls between 85 and 115 for most tests so it is completely true to say you have normal intelligence.
Recent work has indicated that there at least two distinct subtypes of psychopathy. Whilst 'primary' psychopathy is characterized by low anxiety and thought to result from a genetic predisposition, 'secondary' psychopathy is characterized by high anxiety and thought to develop in response to environmental adversity.
Because there is no single standardized test that measures intelligence, determining the highest IQ ever will always be contentious. Bearing these caveats in mind, it is generally believed that the highest IQ score ever recorded is that of William James Sidis, who is believed to have had an IQ of between 250 and 300.
Is Kim Kardashian's IQ really 190? No—it's a baseless rumor from unreliable sites. No verified score exists; estimates range 95–119 based on her education & career, but her actual IQ remains unknown.
Traditionally, cognitive or intellectual functioning has been measured through the intelligence quotient (IQ) tests, with an IQ of less than 70 recommended for a clinical diagnosis of Intellectual Disability.
According to mean scale and item scores analyses, narcissism increased significantly from age 14 to 18, followed by a slight but non-significant decline from age 18 to 23.
Research indicates that BPD is linked to above-average intelligence (IQ > 130) and exceptional artistic talent (Carver, 1997). Because your partner with BPD may be exceptionally bright, they digest information and discover answers to problems more quickly than the average person.
One of the keys to spotting narcissistic personality disorder is observing the “three Es” — exploitation, entitlement, and empathy impairment.