Emerging research suggests our DNA influences the ability to read a persons thoughts and emotions from looking at their eyes. And it appears that genetic capability is prevalent among women but not men.
A new study expands on work initiated twenty years ago when a team of scientists at the University of Cambridge in the U.K. developed a test of cognitive empathy called the Reading the Mind in the Eyes Test (or the Eyes Test, for short).
They discovered that people can rapidly interpret what another person is thinking or feeling from looking at their eyes alone. It also showed that some of us are better at this than others, and that women on average score better on this test than men.
Now, the same team, working with the genetics company 23andMe along with scientists from France, Australia, and the Netherlands, report results from a new study of performance on this test in 89,000 people across the world.
The majority of these were 23andMe customers who consented to participate in research. The results confirmed that women on average do indeed score better on this test.
Study results appear in the journalMolecular Psychiatry.
The new study confirmed that genes influence performance on the Eyes Test. Investigators also discovered that in women, key genetic variants on chromosome 3 are associated with their ability to read the mind in the eyes.
The study was led by Varun Warrier, a Cambridge Ph.D. student, and Professors Simon Baron-Cohen, Director of the Autism Research Centre at the University of Cambridge, and Thomas Bourgeron, of the University Paris Diderot and the Institut Pasteur.
Interestingly, performance on the Eyes Test in males was not associated with genes in this particular region of chromosome 3.
Researchers also found the same pattern of results in an independent cohort of almost 1,500 people who were part of the Brisbane Longitudinal Twin Study, suggesting the genetic association in females is a reliable finding.
The closest genes in this tiny stretch of chromosome 3 include LRRN1 (Leucine Rich Neuronal 1) which is highly active in a part of the human brain called the striatum, and which has been shown using brain scanning to play a role in cognitive empathy.
Consistent with this, genetic variants that contribute to higher scores on the Eyes Test also increase the volume of the striatum in humans, a finding that needs to be investigated further.
Previous studies have found that people with autism and anorexia tend to score lower on the Eyes Test.
The team found that genetic variants that contribute to higher scores on the Eyes Test also increase the risk for anorexia, but not autism. They speculate that this may be because autism involves both social and non-social traits, and this test only measures a social trait.
Warrier said, This is the largest ever study of this test of cognitive empathy in the world. This is also the first study to attempt to correlate performance on this test with variation in the human genome.
This is an important step forward for the field of social neuroscience and adds one more piece to the puzzle of what may cause variation in cognitive empathy.
Bourgeron added, This new study demonstrates that empathy is partly genetic, but we should not lose sight of other important social factors such as early upbringing and postnatal experience.
We are excited by this new discovery, Baron-Cohen said, and are now testing if the results replicate, and exploring precisely what these genetic variants do in the brain, to give rise to individual differences in cognitive empathy.
This new study takes us one step closer in understanding such variation in the population.
Source: University of Cambridge
APA Reference Nauert PhD, R. (2017). Genetics May Influence Ability to See Others Thoughts in Their Eyes. Psych Central. Retrieved on June 8, 2017, from https://psychcentral.com/news/2017/06/08/genetics-may-influence-ability-to-see-others-thoughts-in-their-eyes/121659.html
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Genetics May Influence Ability to See Others' Thoughts in Their Eyes - PsychCentral.com
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