Why is yawning contagious?

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JohnH

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Why is yawning contagious?
« on: 21/02/2009 13:30:02 »
JohnH asked the Naked Scientists:
   
Why is yawning contagious?   Is this a learned social behaviour or is it a hard-wired biological response?

Thanks!

John from Pittsburgh, Pennsylvania

What do you think?


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Offline JnA

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Why is yawning contagious?
« Reply #2 on: 22/02/2009 04:42:01 »
I haven't read the links, so if I am repeating apologies.

There is a theory that copying a yawn is only done by empathetic people.