Hiring decisions have always been limited to a few imperfect factors, including what appears on a resume and what impression a candidate gives off in an informal interview.

 That's all changing.

As Dan Shapero, LinkedIn's VP of Talent Solutions and Insights puts it, "Recruiting has always been an art, but it’s becoming a science."

Using new tracking and analytic tools, researchers have learned to value things like adaptability, social and emotional intelligence, resilience, and friendliness, as well as raw intelligence.