Facial expression of emotion. Facial expression. Darwin (1872) catalogued facial expressions He emphasized their universal nature And emotions as signals E.g., bowlers do not smile when they get a strike they smile when they turn around to see other watching them (Kraut & Johnston, 1979).
Anger = open mouth threat, display
Fear = grimace, silent bared teeth, nervous grin
Happy = Chimpanzee play face
Disgust ? ejection of bad food, wrinkling nose to bad smell
Surprise? Interest raised eyebrows to see more
Similarities in facial expression across closely related species?