When your friend yawns as you chat, don't be angry. For, far from being a sign of boredom, yawning may signal empathy (同感).
Scientists believe that contagious (容易感染他人的) yawning— yawning someone else does —is a sign of being very in the first person's thoughts and feelings. This is the theory of Italian researchers who more than 100 men and women from four continents as they went to work, ate in restaurants and sat in the waiting room. When one of the yawned, the researchers noted whether anyone within 10 feet yawned within the next three . Their results showed that race and had no effect on whether the uncontrollable urge to yawn was . But how well the two people knew each other did.
A reciprocal (相互的) yawn was most to occur among family members, then , then acquaintances. The phenomenon was common among strangers, the journal PLoS ONE reports.
The University of Pisa team concluded that contagious yawning is driven by how emotionally (感情上的) we are to someone and so how likely we are to the same feeling with them. They say there are other reasons to link yawning with empathy. , we start to "catch" yawns from the age of four or five, around the time when we the ability to identify each other's emotions .
Studies also show that those easily by contagious yawning are better at knowing others are thinking about from their faces.
Most animals, including snakes and fish, yawn, it is only contagious in humans and chimps (猩猩) and, according to a recent study, dogs.The researchers, from the University of London's Birbeck College, put 29 in a room with a yawning man and found that 21, or 72%, also started to yawn. They said the skill may allow the pet to build stronger with their owners.
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