Is Yawning Contagious

1
Is Yawning Contagious?

• Social Communication
• Within and Across Species

2
Universal Language

• Smiling
• Benefits of social communication

3
What about Yawning?

• Social communication?
• Why contagious?

4
Which theory is best?

• The Stretching Theory
• The Physiological Theory
• The Evolution Theory
• The Boredom Theory