Foveal to peripheral extrapolation of facial emotion.

Peripheral vision is characterized by poor resolution. Recent evidence from brightness perception suggests that missing information is filled out with information at fixation. Here we show a novel filling-out mechanism: when participants are presented with a crowd of faces, the perceived emotion of faces in peripheral vision is biased towards the emotion of the face at fixation. This mechanism is particularly important in social situations where people often need to perceive the overall mood of a crowd. Some faces in the crowd are more likely to catch people's attention and be looked at directly, while others are only seen peripherally. Our findings suggest that the perceived emotion of these peripheral faces, and the overall perceived mood of the crowd, is biased by the emotions of the faces that people look at directly.