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Is Yawning Contagious?

Is Yawning Contagious?. Social Communication Within and Across Species. Universal Language. Smiling Benefits of social communication. What about Yawning?. Social communication? Why contagious?. Which theory is best?. The Stretching Theory The Physiological Theory The Evolution Theory

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Is Yawning Contagious?

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  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

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