There does seem to be a spectrum. The furthest extremes are very interesting with some people on the deeply empathetic end of the spectrum actually experiencing

There does seem to be a spectrum. The furthest extremes are very interesting with some people on the deeply empathetic end of the spectrum actually experiencing pain when they view other humans experiencing pain. That is to say the viewer's neurons literally fire and send signals that the viewer is in pain when in actuality it is another person falling, bumping into something or what have you. There was a fantastic story about one person who experiences this on NPR's new science podcast Invisibilia [1]. 1. http://www.npr.org/programs/invisibilia/382451600/entanglement?showDate=2015-01-30 http://www.npr.org/programs/invisibilia/382451600/entangleme...