Why is yawning infectious?

@Equinoxx (187)
Ireland
January 16, 2007 4:47am CST
Have you ever noticed that you cannot resist yawning when someone near you yawns. Why is it infectious? Any scientific explanation to this?
1 response
@chiyosan (30184)
• Philippines
27 Jan 07
i dont really know. but i notice that too, when someone yawns, i have the tendency to be yawning too. haha. but i think its psychological, your sight telling you to do that too..
@Equinoxx (187)
• Ireland
28 Jan 07
Appreciate your comments. At least yawning unites people :)