Facial similarity increases trust between people of the same sex. Free Technical Library News

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Facial similarity increases trust between people of the same sex

05.07.2022

A new study has found that people are more likely to trust their money to people with similar facial features.

Scientists at Osaka University used a neural network trained in face recognition to find a relationship between physical similarity and trust. The results of the study showed that among same-sex interlocutors, people trust more those who are similar to them. When interacting with representatives of the opposite sex, such a connection was not found.

For their experiment, the scientists formed a sample of 200 faces of students. All participants were photographed in full face with a neutral expression without glasses and accessories. The researchers also assembled a group of 30 volunteer evaluators who did not know anyone from the original base.

The evaluators were shown randomly all the photos from the set for 0,5 s. They had to rate how much they would trust money to that person on a scale of -3 to +3. The researchers used the pre-trained ArcFace AI system to determine the difference vector between each estimator and the model.

The study showed a strong correlation between increased confidence and similarity in facial features when the rater and model were of the same gender. The authors of the publication note that previous work has established that trust is suppressed when the amygdala is activated. Scientists believe that when we see similar facial features, this part of the brain remains inactive.

The ability to assess the level of trust based on the similarity of faces using AI will be widely used, the researchers believe. For example, this approach can be used to create personalized promotional offers or avatars in P2P lending systems that will appeal to a particular user.

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