Two decades ago the psychologists Robert and Joyce Hogan created an inventory of 11 qualities, ranging from excitable to dutiful, that when taken to the extreme, resemble the most common personality disorders. Subsequent profiling of millions of employees, managers, and leaders reveals that most people display at least three of these “dark side” traits, and about 40% score high enough on one or two to put them at risk for career disruption. For example, being excitable may help you display…
