The eyebrow flash is an unconscious social signal, a raising of the eyebrows for about a fifth of a second that communicates a wish to approach another whom the sender recognizes and is preparing for social contact (such as a greeting). People generally return an eyebrow flash, unless they do not recognize the sender, or the sender looks away immediately after.
The eyebrow flash is an unconscious social signal, a raising of the eyebrows for about a fifth of a second that communicates a wish to approach another whom the sender recognizes and is preparing for social contact (such as a greeting). People generally return an eyebrow flash, unless they do not recognize the sender, or the sender looks away immediately after.
Source: Wikipedia "Eyebrow flash" · CC BY-SA 4.0
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