Research shows that people tend to rate a smiling person as more honest and likeable, and someone they want to cooperate with. But if smiles are so easy to fake, which we know they are, why should we trust them? Alexander Danvers is a postdoctoral research associate at the University of Arizona. To better understand smiles, psychologists like him have turned to a branch of evolutionary biology called signalling theory for insight.
14 Mar 2021