“He’s so Type A!” It’s something that we’ve all heard used to describe someone that is hardworking, demanding or extremely organized — and not always in a positive way. Now a fixture in pop-culture psychology, the concept has been around since the 1950s, when cardiologists Meyer Friedman and Ray Rosenman found a link between heart disease and what’s now identified as Type A personality. And while the stereotypes about this kind of person are easy to recognize, concrete criteria for who is and who isn’t Type A isn’t as clear-cut, especially for someone who is, let’s say, on the compulsive side. “You realize you’re a Type A person when you work with Type Bs — and vice versa,” says Michael Sanger, manager for Hogan Assessments, a company that provides personality assessments to businesses. “And true growth happens when you appreciate and learn from the other personality type.” Don’t know if you’re a Type A? Keep reading to see how many of these traits you identify with.