Psychopaths considered

A somewhat interesting piece by Ed Yong on some recent research on psychopaths.  (The suggestion being that they can see things from other people's perspectives, if they try, but they don't do it automatically like your normal person.)

The details of the study described, though, does give another idea of the very airy fairy, "open to interpretation" nature of a lot of psychological testing.  (As I was complaining about recently when it comes to violence in gaming studies.)