Faces in the wild

摘要

If you look hard enough at someone's face, can you tell what they are feeling? Let's say they seem puzzled, frustrated or relieved. How much information do you get from the face itself and how much comes from what else is happening: what the person is up to, where they are, and who else is around? Imagine that you don't know the person and have no idea what they are doing. Could you still work out what their expression meant?