http://www.sciencedaily.com/releases...0805150645.htm
In case you don't read the article, basically they have found that, instead of the 40 questionnaire used to determine a persons level of Narcissism, a single question can determine the same result. (It's not as informative of specifics, mind you, so it isn't seen as a replacement).
On a scale of 1-7, how Narcissistic are you?
This amuses me greatly.