During this in mind when yawning contagious from one person to another. But UK researchers found that babies and small children will not be infected participate evaporate.

James Anderson and Ailsa Millen from the University of Stirling report in the journal Biology Letters, revealed that infants and young children almost never participated evaporate if  look or being around people who yawn.

This condition is, of course, contrasts with adults who are around 50 percent would participate if they see someone else yawn yawn. This phenomenon is something that makes a contagious infectious (contagious yawning).

In the first part of the study, the mothers asked to record when and how often their children evaporate. 6-34 month-old baby known to yawn after waking up in the morning or after a nap, and a smaller number of adults who on average 9 times per day evaporates. These mothers also reported that children infected with a yawn.

In the second study, infants and toddlers who average 2 year old baby video shown was yawning. Known only 3 of 22 infants who participated evaporate when viewing the video.

“These results show the majority of infants and preschool children get a little psychological effect that makes it go yawn when seeing someone else yawn, compared with adults,” said James Anderson,aturday (4 / 12/2010).

Previous studies said that children under 5 years old tend to be contagious yawning.But when he reached the age of 12 years, then he’ll come infected and have the same level as adults. This is possible because yawning is identical to the sign of empathy, and this condition usually begins to develop when a child is 6 years old.

“Young children and infants less infectious because they do not deal of social pressure or resistance the same with adults, so they will evaporate as they please and when they like to do it,” said Anderson.

Yawning itself has a physiological function and also psychologically important. Cold air intake that suddenly isa act as a radiator, change the blood flow in the face, cooling the brain and increase alertness.