Generalizing from human facial sexual dimorphism to sex-differentiate macaques: Accuracy and cultural variation

► We find humans can accurately sex-differentiate macaques based on the face alone. ► Humans use cues that are sexually dimorphic in human faces to accomplish this task. ► Asian observers perform better than Caucasian observers, due to their increased use of eye height. ► These findings suggest cultural differences in how sexually-dimorphic cues affect person perception.