If you do a Google search for “motivating employees,” first grab a cup of coffee; you’re going to need some caffeine to even scratch the surface of the 26 million hits that show up.From bonuses and time off to approving naps and casual dress to allowing pets at work and holding after-hours happy-hour bull sessions, there’s no end to the grab-bag of strategies employers use to get people to work harder and more efficiently and engender their loyalty. But researchers are slowly making motivation less of a mystery and more of a science. Using tools such as magnetic resonance imaging,
