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Why are yawns contagious?

I'm not sure..it's like every time I see another person yawn..it makes me want to yawn too.I would like to know the answer to this question.Thanks. ;)

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When your body need more oxygen, you yawn. <br /> When you yawn, you take more oxygen in the air. <br /> If the density of the oxygen in the air becomes lower, other people (their bodies) can feel that and start to yawn to get more oxygen.<br /> That's why yawns are contagious

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Thank-you. :3
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Phlorence_602
Excellent answer!
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lol good one -
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That's not even remotely correct
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@Jackie,care to add? :)
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@Me24eva,don't tell me you copy/paste this... =.=
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Yawning when someone else yawns is a social and emotional reaction, and has nothing to do with air density or sensing air density or whatever that is.....
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Well said. :)
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=oO
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LOL! Good one. It sounds scientific but is almost 1000% wrong. We yawn because we see others doing it. That means that we don't do it 100% of the time others are doing it. But, it's just a reminder that "hey, maybe I need to yawn too". For example, if you try to yawn now, maybe you can. So it's psychological. If you see someone stretching, maybe you decide to stretch too. But it has nothing to do with the oxygen theory, but well played.
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don't feel like reading
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this answer seems correct but at the same time i still ave to yawn if i even read the word"yawn"
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Ridiculous answer. The air density change would be so minuscule that it could be completely disregarded and certainly would be undetectable by the human body. If it were true you would also yawn when you go up in elevation... by 15 ft.
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Ok


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This is fundamentally wrong. One person taking a deep breath would not make anywhere near a noticeable change In oxygen density.
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The answer isn't completely wrong though, when you yawn you take in more oxygen, but not enough to change the density.
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No,it's completely wrong.
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No, you're completely ignorant.
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bye
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http://www.guardian.co.uk/uk/2005/dec/07/science.research
here,if you can find out why we yawn than you will be a very famous person.
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Did you even look at the first link? It says we yawn when we need more oxygen. Do you even know what you're talking about? No one knows why they're contagious, but we yawn for a reason.
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No one knows why we yawn in the first place,whoever wrote that article is wrong.
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http://www.buzzle.com/articles/why-do-people-yawn.html It's all theory in the first place.
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Yes,this article is good,the first one stated a single theory as fact and that theory that I find very unprobable.
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That doesn't mean any theory is wrong, however.
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mankilla444

i think so its scary to be around someone who is tired!

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nice pic bro
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Phlorence_602

Ewwwwwwwwwwwwwww....* short of words*

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Power of suggestion.

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Contagious yawning comes from the ancient, deep, and subconscious roots of empathy and social bonding.

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Thank-you. :)
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Yep :)
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what? are u joking? when u get lack of oxygene because of fatigue u yawn 2 fill your brain up!
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That's one theory, although it hasn't been confirmed.
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Yea
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whatever... see for yourself
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Ninja Jackie is right... And did you also know that your yawning can be contagious even to your dog?

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Woah..sounds surprising there as also and thank-you for answering. :)
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They just had the dog story on the news about 2 weeks ago.
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Haha I knew that! Any time my dad would yawn (he would say AHHH-YI YI at the end of his yawns), his dog would end up yawning. After we had her for about two years, she makes a noise when she yawns now too. We call it her speaking. It's like a mini howl.. but not really a howl.. lol I don't know how to describe it. I've never seen a dog do it before. But I'm 100% sure she "learned" it from him. He works on farms, and she's a border collie so she helps him out. She goes everywhere with him, 24/7.
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lol
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seriously? OK im going
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Wolfie, my neighbor has a border collie just like that! They're definitely a one person dog...
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It's from one's subconsciousness, relaxed state of one's mind could transit to other easily when people's mind in a defenseless status.

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thanks.
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when you see other people yawn it makes your brain feel the need to yawn this video will explain a lot http://youtu.be/jGIbUK4nw00

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Thank-you,great details. ;)
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I think it is not true.

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thats sick!!!!!! =oO

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The YouTube video that Erik Neklason suggested, explained the "yawning" subject in great detail. It's sort of a lengthy video, but very helpful, if you really are curious about how & why yawning occurs. Great research efforts to Erik Neklason! *** I give his answer a #10 ****

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Thanks for answering. ;)
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HelloPikachu

Yawning is contagious because some people are bored or tired. But that's not the ony reason. In recent study, scientists observed ages 17-19. Students yawn when they have to watch a boring color test pattern. Now, people yawn to cool down their brains (it is true!). Also when one person yawns, it sometimes makes other people yawn! It's contagious!

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HelloPikachu
Sorry there was a typo. It was "only", not "ony:.
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That pretty much explains the facts,thanks.
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HelloPikachu
No problem, thanks to my brain because I yawned. LOL!
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Oh no! And it's gonna spread around! I wonder how long a yawning cycle is... From one person to the other
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HelloPikachu
And then another person to another...heh!!
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It's not. You just see others doing it so it's sort of reminds you. Just like any other reminder. It's psychological and far from contagious, but so natural that when that reminders triggers you do yawn, it felt like it came from someone. If you see someone washing their car, you may say to yourself "Hmmm, I think I need to wash my car". If you see someone eating, you say "hmmm, Im kinda hungry". It's all pertain to the psyche.

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Thanks.
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Yawns are contagious because it is a sign of telepathic and it cools down the brain.

(more infromation https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDYQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DjGIbUK4nw00&ei=9C7nUOb5NYfMigLCk4HoCg&usg=AFQjCNGvZWI2daEvqAPJc-pzYkXUHEbeIA&sig2=1blRPQwlVvG0hXdCtaOsLg&bvm=bv.1355534169,d.cGE)

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Because, when God finished creating the Earth, He was very tired. He realized that He had no way to express this feeling. Soon, as He rested, a great breath built up inside of Him. He believed it to be a burp. But as soon as He opened His mouth to burp, His mouth grew wider. "What sorcery is this!?" He thought. When He thought His jaw could open no wider, the breath escaped. So on the last day, He secretly went of in solitude, away where none of the other angels could see Him. He said, "Let there be *yawns*...Let there be yawns!" Then, He realized that He was tired, so He took a nap.

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awesome....
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I think people yawn because they are tired or bored.

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It's the power suggestion.
Let's say your in a room with a lot of people and some one starts coughing,
not to far after that you'll hear another and then another, and then another.
When all of the time before the first one started it was quite.

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I agree with Ninja_jackie_san. It's the same with a
*sniff sniff* lol.. I've been yawning while reading this entire page, and frankly, i'm annoyed now. ;)

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cuz of sympathy and empathy

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Check this video out, it will make a lot more scence.

http://www.youtube.com/watch?v=jGIbUK4nw00

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Because u could have been around smoke and u could have took it in and yarned an took it somewhere else

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They are? I didn't know that.

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Well I hate dogs so I am a cat person have been all my life, and I notice that every time I yawn the cat does also. I don't think its just between humans when one cat yawns they all start yawning ans then I do as well. Heck just thinking about it I have yawned at least 4 times since reading and answering this question, there goes number 5. Cays though I notice don't yawn all the time, they tend to only yawn around the late at night times when they are getting ready to goto bed and sleep. Also at the zoo the lions also catch each others yawns and pass them on. Tigers do the same as well.

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....WELL DONT JUST SAY STRAIGHT OUT YA HATE DOGS!!!!! DOGS r waaaayyy more useful ( and better) than cats....and i've got proof.
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Why yawning is contagious? Well, i have one thing to say... INFECTED!!!!

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watch mythbusters

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i wonder that myself lol

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I know myth busters did a test and found it to be inconclusive. I think they said it depends on the person. I know with me you can say the word, let alone someone else yawns, and I yawn no matter if i'm extremely tired or not.

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once you see someone yawn you automatically get tired so you just cant but yawn

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It's weird but if my cat yawns, I yawn! In office meetings where it is very boring, I yawn alot and others do too. The oxygen level in there is fine. If I am with people whose conversation is dull and boring, I yawn.

Coughing is contagious too. If someone else coughs or clears their throat, I have to as well.

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Yawns are contagious because the mind triggers a reflex in the mind. This reflex sends a message through our neurons that we are tired, even if we don't know it.

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Yawns are contagious because the mind triggers a reflex in the mind

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This is just a mental thing it is really just a myth as far as it being contagious. If you are looking at someone yawn alot of people will subconsciously yawn as well but it is not physically contagious. Just like if you notice someone has something on their lip you might lick your lip because subconsciously you notice it and do it without thinking about it.

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Because i like pie hahahaaha

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pie is no laughing matter >:(
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because very many people in the world don't get enough needed sleep so there tiredness gets passed through the air into your body

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Not only yawns, but everything, any habit around you.
Your mind will continiously remember itself uncontiously that someone around you yawned, remembering that makes you want to yawn.

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Thanks. ;)
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Yawns Are contagious because of the carbon dioxide in your breath.

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unborn babies yawn in the womb.children and adults dont just yawn when they are tired or bored,but also before becoming active.we yawn when we go to sleep and when we wake up.the actual case of yawning remains a mystery, and experiments with oxygen masks have shown that it has nothing to do with lack of oxygen .it seems likely that yawning is a social sign or signal that invites others to join in with whatever they do whether its some communal activity or simply going to sleep.around half of those who see another person yawning will do the same,so yawning really is infectious.people who find it very easy to empathise with others are among the most affected.

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I once read that it is a social trait that goes back to when humans lived in caves and did everything as a single group. The leader would yawn signalling the rest of the group it was time to rest.

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your body feels sympathy for others so you yawn

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myth buster did this myth it is a myth

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shannonmacri

I feel it's because we associate yawning with being very tired and relaxed. I see a person yawn, I think about how good it would be to be that relaxed and then I end up yawning. lol

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some say it goes back to primal instincts, that is is a form of communication between humans

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