Turning a medical student into a doctor takes a whole lot of knowledge. B. Price Kerfoot, an associate professor of surgery at Harvard Medical School, was frustrated at how much knowledge his students seemed to forget over the course of their education. He suspected this was because they engaged in what he calls “binge and purge” learning: They stuffed themselves full of facts and then spewed them out at test time.
Research in cognitive science shows that this is a very poor way to retain information, as Kerfoot discovered when he went looking in the academic literature for answers. But he also stumbled upon a method that really is effective, called spaced repetition. Kerfoot devised a simple digital tool to make engaging in spaced repetition almost effortless. In more than two dozen studies published over the past five years, he has demonstrated that spaced repetition works, increasing knowledge retention by up to 50 percent. And Kerfoot’s method is easily adapted by anyone who needs to learn and remember, not just those pursuing MDs.