In their bestselling work The Extraordinary Leader, performance thought leaders John Zenger and Joseph Folkman revealed the 16 key competencies that separate the top 10 percent of leaders from the rest. Since that book's publication, they and coauthor Scott Edinger discovered, through an extensive study conducted over four years, that leaders who possessed the ability to inspire and motivate outperformed all others.

The authors found that the impact of inspiring and motivating others is consistent across different kinds of organizations and within different cultures. The...