When one-month-old Mai is sleeping, it often looks like she is smiling. This is an example of a ________ smile.
A) private
B) reflexive
C) natural
D) social

Question

Quizplus · Accepted Answer

Reflexive smiles are automatic movements of the facial muscles that occur without any particular emotion or stimulation. Infants frequently display reflexive smiles while sleeping, which can sometimes create the appearance of a smile in response to external stimuli, but are not indicative of social interaction or communication.

When One-Month-Old Mai Is Sleeping, It Often Looks Like She