The many faces of mimicry depend on the social context.

One of the richest and most powerful tools in social communication is the face. Facial expressions are a prominent way to convey high-dimensional, dynamic information, such as emotion, motivation, and intentions. Previous research has linked mimicry of facial expressions to positive human interaction (e.g., mutual agreement). In this study, we investigated in a real-world setting whether the mimicry pattern of multiple affective facial expressions depends on the interpersonal attitudinal agreement between interlocutors. We analyzed video clips of Democratic or Republican American politicians being interviewed by either a political ally or an opponent (