Sincere facial expressions are more symmetrical than are insincere expressions.

Question

Quizplus · Accepted Answer

Research has shown that sincere expressions tend to involve more symmetrical movements of facial muscles, whereas insincere expressions tend to involve more lopsided or exaggerated movements on one side of the face. This is thought to be because sincere expressions are produced spontaneously and unconsciously, while insincere expressions require more effort and conscious control.

Sincere Facial Expressions Are More Symmetrical Than Are Insincere Expressions