Experts have warned that people with a certain physical trait are more likely to have a psychiatric disorder, including psychopathy.
Canadian researchers found that people with shorter index fingers compared to their ring fingers are more likely to have a diagnosed psychiatric disorder, according to a study published in The Journal of Psychiatric Research.
The team noted that those with a lower 2D:4D ratio – a shorter index finger and a longer ring finger – are often associated with so-called Dark Triad traits and aggressive behaviour.
These traits include Machiavellianism, narcissism and psychopathy.
The study also revealed that individuals who scored high on the Dark Triad scale also scored high on mental toughness and sports performance.
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The lead researcher, Serge Brand, said not to worry if you have a shorter index finger because it’s quite normal.
He explained that this finger length pattern could also be due to more testosterone and less estrogen in the womb.
“The more an adult participant had signs of psychopathology, the more it appeared that this adult has been exposed to higher testosterone concentrations and lower estrogen concentrations during the prenatal period of life,” Brand told PsyPost.
But he also said: “It is important to understand that the finger lengths-ratio as a proxy of a specific exposure to prenatal sex steroids should not be understood as a person’s irrevocable fate.”
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