Facial expressions seen in primates during play and submission map onto human expressions of _____ and _____, respectively.
A) laughter, sadness
B) laughter, smiling
C) smiling, crying
D) smiling, sadness

Question

Quizplus · Accepted Answer

Studies have shown that the facial expressions of primates during play correspond to human laughter, while expressions of submission correspond to human smiling. Therefore, the best choice is B, laughing for play, and smiling for submission.

Facial Expressions Seen in Primates During Play and Submission Map