Which of the following statements about yawning is TRUE?
A) Yawning is usually followed by a decrease in activity level.
B) One bit of evidence confirming that yawning is contagious is that about half of adults will yawn when shown videos of other people yawning.
C) Contagious yawning is rare or nonexistent in highly social primates such as macaques and chimpanzees.
D) Blind people never experience contagious yawning.

Question

Quizplus · Accepted Answer

The statement that about half of adults will yawn when shown videos of other people yawning is evidence confirming that yawning is contagious. The other statements are false. Yawning can be followed by an increase in activity level, contagious yawning has been observed in some highly social primates, and blind people can still experience contagious yawning.

Which of the Following Statements About Yawning Is TRUE