Just how long we gaze at faces may be partly determined by our genes.
A new study focused on a single gene, the one coding for the cannabinoid receptor 1 (CNR1) in brain cells. Participants with certain mutations in this gene spent more time looking at happy faces than others did.
The results suggest these mutations may be involved in differences in how people process emotions on faces, the researchers said.
In practical terms, the findings may provide insight into the genetics of autism. Individuals with autism have trouble understanding facial emotions and look less at people's faces, the researchers said.
Why Do We Like Happy Faces? It's In Our Genes - Yahoo! News
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