A new study found that people often perceive people who are deemed trustworthy look like themselves.
Being trustworthy is a valuable virtue. A new study found that when a person deems another individual trustworthy, he always perceives that person as looking like him.
"Recent studies show that when a person looks similar to ourselves, we automatically believe they are trustworthy. Here we show for the first time that the reverse is also true. When a person is shown to be more trustworthy, it can lead us to perceive that person as looking more similar to ourselves," said researcher Harry Farmer.
For the study, researchers showed participants images in which varying percentages of the participant's face were morphed with that of one of two other people, and asked them to decide whether each photo contained more of their face or more of the others. Participants were also asked to take part in bargaining games with both of the other people - one in which trust was reciprocated, and in the other in which it was betrayed. After the game, the participants carried out the photo morph task again and it was found that participants judged the trustworthy player to be more physically similar to them than the untrustworthy one.
The researchers of the study also believe that their results could hold important implications for social relationships.
Lead author Professor Manos Tsakiris said: "Our results show how our perceptions of similarity between us and others extend beyond objective physical characteristics, into the specific nature of social interactions that we have."
"It may be that our experience of facial similarity tracks information about genetic relatedness. If so, our results suggest that evidence of trust in others also serves as a cue to kinship," added co-author Ryan McKay.
