We examined the role of different facial features (shape of eyebrows, eyes,
mouth, nose, and the direction of gaze) in conveying the emotional impact
of a threatening face. In two experiments, a total of 100 high school stude
nts rated their impression of two sets of schematic faces in terms of seman
tic differential scales (Activity, Negative Evaluation, and Potency). It wa
s found that the different facial features could be ordered hierarchically,
with eyebrows as the most important feature, followed by mouth and eyes. E
yebrows thus fundamentally categorised faces as threatening or nonthreateni
ng. The different shapes of mouth and eyes provided subsequent categorisati
ons of faces within these primary categories.