With Mark Zuckerberg testifying before Congress and a “dealmaker” in the Oval office, business leaders have recently occupied the attention of the American media. But what qualities link these two seemingly different CEOs? Studies suggest certain attributes can enhance or diminish a person’s leadership abilities; in fact, employees being groomed for executive positions will often undergo a leadership assessment, conducted by psychologists, to determine if they have what it takes.¹ Now researchers have begun applying their own scientific tools to empirically test what characteristics can make or break a leader.