Researchers studying people’s musical preferences have found that psychopaths prefer listening to rap music and, contrary to the movie trope epitomised by Anthony Hopkins’s Hannibal Lecter in The Silence of the Lambs, they are no fonder of classical music than anyone else.
In a study of 200 people who listened to 260 songs, those with the highest psychopath scores were among the greatest fans of the Blackstreet number one hit No Diggity, with Eminem’s Lose Yourself rated highly too.
The New York University team behind the work stress that the results are preliminary and unpublished, but the scientists are sufficiently intrigued to launch a major study in which thousands of people across the psychopathy spectrum will be quizzed on their musical tastes.
Tests on a second group of volunteers suggest the songs could help to predict the disorder. Whatever their other personality traits might be, fans of The Knack’s My Sharona and Sia’s Titanium were among the least psychopathic, the study found.
The researchers have a serious goal in mind: if psychopaths have distinct and robust preferences for songs, their playlists could be used to identify them.
“The media portrays psychopaths as axe murderers and serial killers, but the reality is they are not obvious; they are not like The Joker in Batman. They might be working right next to you, and they blend in. They are like psychological dark matter,” said Pascal Wallisch who led the research.
About 1% of the general population meets the description of a psychopath, but the figure is far higher in prisons, where about one in five has the disorder. One estimate, from Kent Kiehl, a psychologist at the University of New Mexico, suggests that psychopaths cost the US government alone $460bn (£340bn) a year.
“You don’t want to have these people in positions where they can cause a lot of harm,” said Wallisch. “We need a tool to identify them without their cooperation or consent.”
Scientists have already found gene variants that are more common in psychopaths, but they are hardly predictive of the disorder. They appear to alter people’s tendencies for empathy and aggression, but they do not determine people’s actions. Brain scans highlight distinct signs too, as the neuroscientist James Fallon discovered when he spotted the patterns of a psychopath in his own brain’s anatomy, but again, these do not set a person’s behaviour. Even if they did, the police cannot search for dangerous individuals by hauling people into brain scanners.
Wallisch recruited volunteers for a study on musical tastes, but realised that many of the participants had separately sat a battery of psychological tests, including one called the Levenson Self-Report Psychopathy Scale, which ranks people’s psychopathic traits. By combining the volunteers’ answers from the music study with their results from the psychopath test, Wallisch identified songs that seemed to be most popular among psychopaths, and others favoured by non-psychopaths.
While No Diggity and Lose Yourself were strikingly popular with psychopaths, other songs had greater predictive power. Wallisch declined to name them out of concern that doing so might compromise any future screening test.
The larger study will now investigate whether the link between musical tastes and psychopathy is real, and if it is, whether groups of songs can predict potential psychopaths. That could lead to some controversial applications, Wallisch said. If the team can identify a group of 30 songs, for example, that together prove good at predicting psychopaths, then playlists from online music providers could be used to identify them.
“The beauty of this idea is you can use it as a screening test without consent, cooperation or maybe even the knowledge of the people involved,” Wallisch said. “The ethics of this are very hairy, but so is having a psychopath as a boss, and so is having a psychopath in any position of power.” Fortunately for ethicists, the possibility is some way off yet. “This work is very preliminary,” Wallisch added. “This is not the end of an investigation, it is the very beginning.”
Kevin Dutton, a psychologist at Oxford, and the author of The Wisdom of Psychopaths, has been gathering data on musical tastes and other preferences for a psychopath study with Channel 4. More than three million people have responded so far, and while online surveys have serious weaknesses, the results so far suggest psychopaths favour rap music over classical and jazz. They also seem more likely to read the Financial Times than other newspapers.
Regardless of its accuracy, Dutton suspects movie directors like the idea of classical music-loving psychopaths because of the “irresistibly alluring” juxtaposition. “The coming together of the dark, visceral, primeval psychopathic mind and the higher aesthetic of classical composition is inherently incongruous, and there is a whole body of literature on the creative potential of incongruity,” he said. “It is the hypnotically captivating and age-old appeal of the ‘beauty and the beast’, only under the same cortical roof.”