Your Facebook Profile Really Can Predict Your Job Performance

What your mom said is true. If a prospective employer sees that you let it all hang out on Facebook, you're less likely to be offered a job, according to a new study published online in the Journal of Applied Social Psychology. But how well you police your Facebook profile doesn't actually predict your job performance. Rather, the more agreeable and emotionally stable you seem on the social networking site, the better you are at your job.

A fifth of employers give applicants a personality test to judge how good they'll be at a job, according to Peter Rosen, an assistant professor of management information systems at the University of Evansville, and one of the study's three co-authors.