What is it about someone’s face that makes us trust them?

We choose to trust or be on-guard within seconds of meeting someone…. Why? A study by Princeton psychology researchers found we are most likely to trust someone who has a U-shaped mouth and eyes that form an almost surprised look and not trust those faces, that the edges of the mouth curl down and the eyebrows point down at the center.

Sneak a peak at the Princeton psychology researchers computer-generated range scale of Trustworthy Faces.