A psychopath, as described by psychologists, is emotionally flat, lacks empathy for the feelings of others, and is free of remorse. Psychopaths behave as if the world is to be used for their benefit, and they employ deception and feigned emotion to manipulate others.
The words of the experimental subjects matched these descriptions. Psychopaths used more conjunctions like “because,” “since” or “so that,” implying that the crime “had to be done” to obtain a particular goal. They used twice as many words relating to physical needs, such as food, sex or money, while non-psychopaths used more words about social needs, including family, religion and spirituality.
Study co-author Michael Woodworth, associate professor of psychology at the University of British Columbia, prefaced the title of the paper with “Hungry Like the Wolf” to reflect the fact that psychopaths are predators and that their stories often included details of what they had to eat on the day of their crime.