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Yawn

en.wikipedia.org/wiki/Yawn

A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the ... This "contagious" yawning has also been observed in chimpanzees, dogs, and can occur acros...

Why Are Yawns Contagious? | Mental Floss

mentalfloss.com/article/64654/why-are-yawns-contagious

Jun 11, 2015 ... Yawning feels good, so why not join in when someone else yawns? Well, you're not really “joining in,” because you aren't copying the yawn on ...

Why Is Yawning So Contagious? | Psychology Today

www.psychologytoday.com/blog/the-athletes-way/201403/why-is-yawning-so-contagious

Mar 16, 2014 ... ... “Individual Variation in Contagious Yawning Susceptibility Is Highly ... Contagious yawning is a phenomenon that only occurs in humans and ...

Facts About Yawning: Why We Do It, Why It's Contagious And More

www.huffingtonpost.com/2013/06/10/facts-yawning-why-we-yawn-contagious_n_3398301.html

Jun 10, 2013 ... Yawning Really Is Contagious It's true! One study found that when shown videos of yawning, around 50 percent of people also began yawning.

Is Yawning Really Contagious? | Van Winkle's

vanwinkles.com/is-yawning-really-contagious

Nov 19, 2015 ... Do we really pass around yawns, or is it just an old wive's tale?

You could be a psychopath if you don't yawn, a study has found ...

www.dailymail.co.uk/news/article-3199335/You-psychopath-don-t-yawn-study-found.html

Aug 15, 2015 ... Brian Rundle, a PhD student involved in the study, told The Times: 'One of the biggest lines of evidence is that (contagious yawning is) very ...

Why Do We Yawn and Why Is It Contagious? | Science | Smithsonian

www.smithsonianmag.com/science-nature/why-do-we-yawn-and-why-is-it-contagious-3749674/

Jun 28, 2013 ... Unfortunately, this explanation is actually a myth, says Steven Platek, ... Along with being contagious, yawning is highly suggestible, meaning ...

Why Do We Yawn - and Why Is Yawning So Contagious? - Healthy ...

www.everydayhealth.com/healthy-living/why-do-we-yawn-and-why-is-yawning-contagious.aspx

Dec 15, 2011 ... Ever wonder why we yawn or why yawning is contagious? We take a ... So what really causes yawning and makes it so infectious? Below, we ...

BBC NEWS | UK | Magazine | Why is yawning contagious?

news.bbc.co.uk/2/hi/uk_news/magazine/6270036.stm

Jul 5, 2007 ... Rather than being a precursor to sleep, yawning is actually designed to keep you awake, say US researchers. But why does seeing someone ...

The Surprising Science of Yawning - The New Yorker

www.newyorker.com/science/maria-konnikova/the-surprising-science-of-yawning

Apr 14, 2014 ... While yawning isn't actually related to the amount of sleep we ... in the womb, contagious yawning develops only later in life, as does empathy.

Answer
Yawning is thought to cool the brain and make it more alert. Simultaneous yawning may occur when a group of people are all breathing the same warm, stale air. Or contagious yawning may have evolved to help groups remain vigilant against danger.
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Does contagious yawning mean you're nice? | HowStuffWorks

science.howstuffworks.com

Contagious yawning is associated with the same parts of the brain that deal with ... You don't need to actually see a person yawn to involuntarily yawn yourself; ...

Is yawning contagious? If so, why? What's the evidence? - Quora

www.quora.com

This is the most interesting hypothesis behind contagious yawning that I've seen: Yawning cools .... Looks like Girkin didn't realize what has actually happened.

Is that person a psychopath? A yawn might help you tell - TODAY.com

www.today.com

Aug 24, 2015 ... Contagious yawning — or yawning when you see someone else do it — is a very primitive form of communication and bonding, Rundle says.