Spanning all cultures and eras, roughly one man in every 100 is born a clinical psychopath, as well as one woman in every 300. They are so common that every person reading this sentence almost certainly knows one personally; indeed, a significant number of readers are likely psychopaths themselves.
It's not a subtle test; it just gives you a bunch of traits and you say whether you have them or not.
Pseudo-Scientific Psychopath Detector
Glibness/superficial charm = NO
Egocentric, exaggerated self-image = SOMEWHAT
Need for stimulation/bored easily = YES
Pathological lying = NO
Conning and manipulativeness = NO
Lack of remorse or guilt = NO
Shallow emotions = NO
Callousness and lack of empathy = NO
Parasitic lifestyle = NO
Poor behavioral controls = SOMEWHAT
Sexual promiscuity = YES
Childhood behavior problems = SOMEWHAT
Lack of realistic long-term goals = SOMEWHAT
Impulsivity = SOMEWHAT
Irresponsibility = SOMEWHAT
Failure to accept responsibility for actions = NO
Many short-term relationships = YES
Varied criminal behavior = SOMEWHAT
Posts 'first' messages = NO
Probable diagnosis = Non-psychopath with criminal leanings
LOL. I said 'Yes' to 'Promiscuous' and 'Many short term relationships' because I used to live like that twenty years or more ago, and I thought it would be fun to see what effect that had on results.
Do you feel 'psychopath' is a meaningful term? Do you know a person who might be a psychopath?
There are two groups of people I have known in my life whom I might put in that category. One is the highly successful businessman/corporate type, who seems indifferent to human feeling. Of course most successful people are not that type. The other group are drop outs - again only a small subset of these - people who seem to be incapable of engaging with others, and never finish anything, never repay their debts, you know the type. I think heavy duty drug addiction can mimic psychopathy too.
ETA - Black Man by Richard Morgan could be read as a description of a psychopathic subspecies of humanity. I am not sure that the finished story is as straight forward as that, but quite likely it was what he set out to write.