Which characteristic indicates to a trained observer that a person's smile is NOT sincere?
A)The smile includes a crinkling of the corners of their eyes.
B)The smile is slightly lopsided.
C)The smile lasts for about 3 seconds.
D)The smile engages the zygomatic major muscle.

Question

Quizplus · Accepted Answer

A trained observer would know that a sincere smile will involve an equal and symmetrical movement of the muscles on both sides of the face. A slightly lopsided smile indicates that the person may be forcing or faking the smile.

Which Characteristic Indicates to a Trained Observer That a Person's