A new experiment has been going on over at Kaggle.com to see if people's tweets can reveal psychopathic tendencies. According to the experiment webpage, "The organizers provide all interested participants an anonymised dataset of users self assessed psychopathy scores together with 337 variables derived from functions of Twitter information, useage and lingusitc analysis. Psychopathy scores are based on a checklist developed by Professor Del Paulhus at the University of British Columbia." The result is to test for Psychopathy, Narcissism and Machiavellianism using people's publicly available tweets.