Social Categorization From Faces: Evidence From Obvious and Ambiguous Groups

People use facial features (e.g., face shape, skin color, eye structure) both in isolation and in combination to identify others as members of a variety of social categories. For some categories (e.g., age, race, and sex), the markers are obvious and people categorize their members almost perfectly. For others, however (e.g., political affiliation, religious following, and sexual orientation), the markers are ambiguous, yet people can still categorize members of these groups with better than chance accuracy and little effort or awareness. Here, we describe how people categorize others into both perceptually obvious and perceptually ambiguous social groups from their faces, discussing potential mechanisms that may underlie categorization accuracy and noting some of the social consequences that result from categorizing other people into groups.