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Fingers on the hands can help identify a psychopath: scientists' discovery

Alina MilsentNews
Research of scientists

Recently, scientists have discovered a simple way to identify a psychopath in the real world. As it turned out, you just need to pay attention to the fingers.

Specialists from the Charles-Le Moyne Research Center in Quebec, Canada, say that the data obtained indicate that psychopathy may have "biological roots." The details were reported by the Daily Mail.

The study showed that people whose ring finger is longer than the index finger are more likely to have psychopathic tendencies. The experiment involved 80 participants, 44 of whom had a clinical diagnosis of antisocial personality disorder.

Fingers on the hands can help identify a psychopath: scientists' discovery

After a detailed scan of the participants' right hand and psychological testing, the researchers made unexpected findings. Higher scores in these tests indicated that the subject had a higher level of psychopathic and antisocial traits. At the same time, the scientists emphasized that psychopathic behavior "may be biologically rooted."

The results revealed a clear link between a lower 2D:4D ratio (the length of the ring finger to the index finger) and antisocial traits, as well as higher scores on personality tests.

Previous studies have shown that finger length is influenced by the amount of testosterone and estrogen a fetus is exposed to in the womb. Higher testosterone levels cause a lower 2D:4D ratio, while lower testosterone levels cause a higher 2D:4D ratio.

Fingers on the hands can help identify a psychopath: scientists' discovery

"The more signs of psychopathology an adult participant had, the more it seemed that this adult had been exposed to higher concentrations of testosterone and lower concentrations of estrogen during the prenatal period of life," said Serge Brand, lead researcher.

However, Brand also emphasized that a low 2D:4D ratio is not a 100 percent indicator of psychopathy.

"It is important to understand that the finger length ratio as a proxy for specific prenatal sex steroid exposure should not be understood as a person's irrevocable destiny. The 2D:4D ratio is not only a sign of antisocial personality traits," the scientist emphasized.

The results also showed that men tend to have a lower 2D:4D ratio than women, regardless of any psychopathic tendencies.

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