Emotions as Social Information (EASI) Model

The premise of this perspective is that, just as mood provides information to the self, emotional expressions provide information to observers, which may influence their behavior. The EASI model extends this notion by identifying two processes through which observers’ behavior may be influenced: inferential processes and affective reactions.

Reference:
Van Kleef, G. A. (2009). How emotions regulate social life the emotions as social information (EASI) model. Current Directions in Psychological Science, 18(3), 184-188. doi: 10.1111/j.1467-8721.2009.01633.x