So i've been watching some vids by this guy and I found this one the most interesting. At one point in the video he talks about how a study was done to determine if one is empathetic or not. In the group of people tested there was one person in the group working for the researchers and his job was to just yawn, which then caused others to yawn. The interesting thing is that those that yawned the most scored highest on the empathy test. So coincidence? You decide. But it is interesting.

Link to vid