Are Wikipedia contributors grumpy?

Forget altruism. Misanthropy and egotism are the fuel of online social production. That’s the conclusion suggested by a new study of the character traits of the contributors to Wikipedia. A team of Israeli research psychologists gave personality tests to 69 Wikipedians and 70 non-Wikipedians. They discovered that, as New Scientist puts it, Wikipedians are generally “grumpy,” “disagreeable,” and “closed to new ideas.”