Contagious yawn ’caused by empathy’
It is the plague of boardroom meetings, university lecture halls, and dentists’ waiting rooms everywhere – the contagious yawn.
http://www.telegraph.co.uk/science/science-news/8004191/Contagious-yawn-caused-by-empathy.html
Now scientists have discovered why the expression of tiredness spreads from person to person throughout a room and why young children are immune to it. Workers who have the impulse to follow the yawns of their colleagues are simply trying to show empathy.