It really doesn't say much -- very successful .. manipulative .. no emotion .. the last 2 are quite subjective, quite common too.<p>There was an article on this topic some time back. Much more elaborate. Someone had done many years of study and came out with the conclusion that there are a large number of psychopaths. Even at home we could have relatives who are "sub-clinical psychopaths". He devised a test, but iirc, he advised others not to follow it, or to take its results seriously. However, it seems people have been using it while recruiting.