== Psychopath vs. Sociopath? == 

 The article refers to the example of the Mr. Hyde alter ego character (as opposed to the Dr. Jekyll character) as being a psychopath. If I'm not mistaken, I believe Hyde actually represents more of a sociopathic personality. I could be wrong there; but this seems to be the case. The difference would rest on whether the alter ego was operating in a delusional state of reality or not  vs. simply being an amoral monster who understands the reality all too well.