An observer trained in detecting facial expressions is likely to use morphology and look at the _____ to tell if someone is smiling sincerely or just faking a smile.
A)lips
B)entire mouth
C)eyes
D)forehead

Question

Quizplus · Accepted Answer

An observer trained in detecting facial expressions is likely to look at the eyes to tell if someone is smiling sincerely or just faking a smile. The muscles around the eyes play an important role in genuine smiles, whereas fake smiles only involve the muscles around the mouth. Therefore, looking at the morphology of the eyes is a more reliable indicator of sincere emotions.

An Observer Trained in Detecting Facial Expressions Is Likely to Use