Edit: Another possible scientific reason as to why we do this:
1. Person observes yawn
2. Sensory input of the brain deactivates left periamygdalar region
3. Subject yawns in response.
It is mainly social empathy in which causes this reaction to viewing another's yawn.
Also: When you see someone else yawn, it's because their brain thinks they are low on oxygen so they open up and yawn to get more. Then, your brain thinks that person is stealing your oxygen and sealing it off from you, so your brains reaction is to yawn and the chain goes on and on and on...
Hope this helped.
People yawn when they see someone else do it because it triggers something in the brain so you can't help but yawn. Yawning is contagious.
Dogs yawn just like we do, they're sleepy, bored or see someone else do it. Only they do it for more reasons as well, such as, when they are nervous or we are pressurizing them to much.
because your sleepy too.
Sight. If you see someone yawn you start to yawn, if you see someone smile you may start to smile to even blinking or itching can sometimes be contagious by sight.
It is not really contagious because its not a decease, but it does make you want to yawn when you see someone do it. For most people at least.!
When you see somebody else yawn, your brain subconciously panics that the person is taken up all of the oxygen. So your brain makes you yawn so you get your own intake of oxygen. Just incase it all runs out :)
They probably just woke up. People yawn when they wake up too.
yes. most people yawn when they see others do it. its psychological
Why do people yawn is pretty good..... Or see what your name means.
People love someone that is going out with someone else because the heart wants what the heart can't have. People also don't know what they want until they see it for them self.