In 1990, Elizabeth Newton earned a Ph.D. in psychology at Stanford by studying a simple game in which she assigned people to one of two roles: "tappers" or "listeners." Tappers received a list of twenty-five well-known songs, such as "Happy Birthday to You" and "The Star- Spangled Banner." Each tapper was asked to pick a song and tap out the rhythm to a listener (by knocking on a table). The listener's job was to guess the song, based on the rhythm being tapped. (By the way, this experiment is fun to try at home if there's a good "listener" candidate nearby.) The listener's job in this game is quite difficult. Over the course of Newton's experiment, 120 songs were tapped out. Listeners guessed only 2.5 percent of the songs: 3 out of 120.

But here's what made the result worthy of a dissertation in psychology. Before the listeners guessed the name of the song, Newton asked the tappers to predict the odds that the listeners would guess correctly. They predicted that the odds were 50 percent.

The tappers got their message across 1 time in 40, but they thought they were getting their message across 1 time in 2. Why?

When a tapper taps, she is hearing the song in her head. Go ahead and try it for yourself-tap out "The Star-Spangled Banner." It's impossible to avoid hearing the tune in your head. Meanwhile, the listeners can't hear that tune-all they can hear is a bunch of disconnected taps, like a kind of bizarre Morse Code. In the experiment, tappers are flabbergasted at how hard the listeners seem to be working to pick up the tune. Isn't the song obvious? The tappers' expressions, when a listener guesses "Happy Birthday to You" for "The Star-Spangled Banner," are priceless: How could you be so stupid?

It's hard to be a tapper. The problem is that tappers have been given knowledge (the song title) that makes it impossible for them to imagine what it's like to lack that knowledge. When they're tapping, they can't imagine what it's like for the listeners to hear isolated taps rather than a song. This is the Curse of Knowledge. Once we know something, we find it hard to imagine what it was like not to know it. Our knowledge has "cursed" us. And it becomes difficult for us to share our knowledge with others, because we can't readily re-create our listeners' state of mind.

The tapper/listener experiment is reenacted every day across the world. The tappers and listeners are CEOs and frontline employees, teachers and students, politicians and voters, marketers and customers, writers and readers. All of these groups rely on ongoing communication, but, like the tappers and listeners, they suffer from enormous information imbalances. When a CEO discusses "unlocking shareholder value," there is a tune playing in her head that the employees can't hear. It's a hard problem to avoid-a CEO might have thirty years of daily immersion in the logic and conventions of business. Reversing the process is as impossible as un-ringing a bell. You can't unlearn what you already know. There are, in fact, only two ways to beat the Curse of Knowledge reliably. The first is not to learn anything. The second is to take your ideas and transform them.

This book will teach you how to transform your ideas to beat the Curse of Knowledge. The six principles presented earlier are your best weapons. They can be used as a kind of checklist. Let's take the CEO who announces to her staff that they must strive to "maximize shareholder value."

Is this idea simple? Yes, in the sense that it's short, but it lacks the useful simplicity of a proverb. Is it unexpected? No. Concrete? Not at all. Credible? Only in the sense that it's coming from the mouth of the CEO. Emotional? Um, no. A story? No.

Contrast the "maximize shareholder value" idea with John F. Kennedy's famous 1961 call to "put a man on the moon and return him safely by the end of the decade." Simple? Yes. Unexpected? Yes. Concrete? Amazingly so. Credible? The goal seemed like science fiction, but the source was credible. Emotional? Yes. Story? In miniature.

Had John F. Kennedy been a CEO, he would have said, "Our mission is to become the international leader in the space industry through maximum team-centered innovation and strategically targeted aerospace initiatives." Fortunately, JFK was more intuitive than a modern-day CEO; he knew that opaque, abstract missions don't captivate and inspire people. The moon mission was a classic case of a communicator's dodging the Curse of Knowledge. It was a brilliant and beautiful idea-a single idea that motivated the actions of millions of people for a decade.

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Copyright © 2007 by Chip Heath & Dan Heath.

Tags: Career & Money

About the Author

Chip Heath is a Professor of Organizational Behavior in the Graduate School of Business at Stanford University. He has taught courses on organizational behavior, negotiation, strategy and international strategy at the University of Chicago School of Business and The Fuqua School of Business at Duke. His research examines why certain ideas-ranging from urban legends to folk medical cures, from Chicken Soup for the Soul stories to business strategy myths, survive and prosper in the social marketplace of ideas. Chip designed a course at Stanford that examines the principles of naturally sticky ideas to design messages that would be more effective. Chip is the co-author of a book titled What Sticks - Why Some Ideas Work in the World and Others Don't. The book will be published by Random House in 2007. Chip has taught and consulted on the topic of making ideas stick at such companies as Nissan, Chronicle Books, Ideo, as well as West Point. More

Dan Heath is a consultant at Duke Corporate Education. A former researcher at Harvard Business School, he is a co-founder of Thinkwell, an innovative new-media textbook company. He lives in Raleigh, North Carolina.