The expert in this area would be Dr. Richard Hare. He is at the University of British Columbia. He has spent over 20 years studying and researching Psychopathy. He is also known for his diagnostic criterion for the DSM IV. He also developed the diagnostic instructions for both testing procedures and training those who administer the test. My brother shows traits as well as his daughter. My brother was anything but neglected, his daughter is not receiving the emotional support she needs, just given toys and sent off to boarding school. I feel in love with someone with every trait; 8 felonies, lies, cheats, has an organized form of stealing, addicted to booze and coke, many lovers at the same time, revocation of parole. He was shallow, showed false charm. I let him seduce me and I'm gay! On the difference between sociopaths and psychopathy, not sure in my research but psychopaths are born, sociopaths are a product of their environment. Beware of Sam Vankin, a self proclaimed narcissist who has many websites.