Personality and Social Psychology Bulletin, 34 (10), 2008, p 1303-1314
Narcissism is excessive self-love, inflated self-importance and unjustified feelings of entitlement. Along with electrons, it is the primary active ingredient in the Internet. Three years ago, psychologists decided to publish a research paper on its prevalence on social networking sites, presumably because they didn't think anyone would read the entire set of encyclopedias they could have filled, and simply publishing the words "Everything on all of them" felt too glib.
Researchers had 156 students fill out a survey called the Narcissistic Personality Inventory (NPI) that forces subjects to choose between options like, "My body is nothing special" versus "I like to look at my body," and "I can learn from other people" versus "I can solve most global problems by spitting on them." Researchers then monitored the student's Facebook activity for what they called objective and subjective factors, and compared that with how they scored on the NPI. The scientists' goal was to see if they could isolate social networking behaviors that were more narcissistic, and to boil down complex human emotions into numbers, because that's like oxygen to them.
An 8.7 on the It-normalized Birthday Trauma scale according to Science.