Everyone knows that the yawning that affects us daily is usually contagious, moving from person to person unconsciously. When we see a person yawning we yawn in our turn, but why?
An experiment by Duke University showed that 70 percent of those who watched a video or images of "yawning" yawned in less than three minutes.
More than 15 times during the video viewing period, more than 15 per cent of the participants were interviewed, the New Brunswick News reported.
In a study published on the site of "Brent Biology," scientists said the desire to yawn when seeing someone yawn called "yawning" scientifically.
The "yawning infection" is a type of medical "ecofinemonium", which impels the person to imitate involuntarily, which in other cases involves mimicking the way someone else's words or actions are.
Such is the case in which a person imitates a person outside his or her own will, the terms another person paints on his face as he speaks.
In another study conducted by Georgetown University in Washington, the researchers said that "yawning infection" is a kind of "social tradition", where enzymes mimic the sense of the opposite person involuntarily.
A recent study also found that yawning rates rise with a high temperature, and it is strange that the study confirmed that fatigue or hours of sleep did not affect the yaw rate in the subjects.
Interestingly, the person's attempt to avoid yawning increases the desire for yawning, similar to the case of obsessive-compulsive disorder, according to the site.
