No compassion for cheaters, brain scans show

From ScienceNOW:

Most people can empathize when they see someone else in pain. But if the guy who's suffering has recently done you wrong, well, sometimes it's a little harder to feel bad for him. Now neuroscientists have found that brain activity related to empathy is indeed reduced when people have been treated unfairly. Surprisingly, the effect seems to be particularly strong in men.

Link to article by Greg Miller