Surprising physical trait psychopaths could be identified by, according to study

Ever wondered whether or not you might be a psychopath? Well, apparently, there's a pretty accurate way to find out - by looking in a mirror.

That's because, according to a recent study conducted by the Journal of Psychiatric Research, amongst the number of tell-tale signs when it comes to psychopathic behaviour is one physical trait, which is apparently quite common.

According to a batch of doctors studying similarities in criminal and social behaviour, one particular characteristic ceaselessly comes up between individuals that are considered to embody psychopathy.

Although it's not be something you need to worry about if you do have this trait, it might be something to take into consideration.

There's a common physical attribute amongst psychopaths (Natalia Lebedinskaia/Getty)

The Canadian research team behind the study came to their conclusion after looking at similarities between individuals who have been diagnosed with various psychiatric conditions.

It saw 88 volunteers - 44 with psychiatric issues and 36 people without any reported mental health conditions - placed under assessment.

An analysis of their physical attributes confirmed that there is some correlation between those with psychiatric conditions and one specific physical trait.

According to the study, participants' hands confirmed that those with a clinically diagnosed condition were more likely to have a shorter index finger and a longer ring finger - aka what they call a 2D:4D ratio.

"Compared to healthy controls, individuals with a clinically diagnosed psychiatric issue were more likely to have a shorter index finger and longer ring finger," the study explained.

You may want to check your finger proportions (sarunyu_foto/Getty)

According to research, those who have lower 2D:4D ratio are known to be more associated with what scientists call the 'Dark Triad' personality traits.

These are 'highly socially discouraged attitudes, namely machiavellianism, narcissism and psychopathy' - and spparently, those who scored high on the Dark Triad evaluation 'also scored high on mental toughness and sports performance, but also on various types of negative psychosocial and psychological outcomes, including intolerance of uncertainty, anxiety sensitivity callous affect, and interpersonal manipulation.'

If you do have this particular trait, don't panic, it doesn't mean you're about to transform into a psychopath.

Lead author, Serge Brand, says it's actually very common for lots of people.

Apparently, the trait can develop in utero, when a baby is exposed to higher levels of testosterone and lower estrogen in the first trimester.

Several medics have supported the stats (Oscar Wong/Getty)

Serge told PsyPost: "The topic is interesting, because the relation of the lengths of index finger (2D) and ring finger (4D) is one of the most robust biological markers formed during the prenatal stage with a remarkable impact later on an adult’s behavior.

"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.

"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."

Do you have this trait? *Checks fingers*

• Psychologist admits there's one trait that all narcissists display
• Weight loss drugs could have major impact for couples in the bedroom - particularly men
• People who live to 100 appear to all share one 'superhuman' trait, scientists find
• Losing confidence in yourself could be a sign of Britain's most feared disease