"Elizabeth Newton, a psychologist, conducted an experiment on the curse of knowledge while working on her doctorate at Stanford in 1990. She gave one set of people, called “tappers,” a list of commonly known songs from which to choose. Their task was to rap their knuckles on a tabletop to the rhythm of the chosen tune as they thought about it in their heads. A second set of people, called “listeners,” were asked to name the songs.
Before the experiment began, the tappers were asked how often they believed that the listeners would name the songs correctly. On average, tappers expected listeners to get it right about half the time. In the end, however, listeners guessed only 3 of 120 songs tapped out, or 2.5 percent.
The tappers were astounded. The song was so clear in their minds; how could the listeners not “hear” it in their taps?
That’s a common reaction when experts set out to share their ideas in the business world, too, says Chip Heath, who with his brother, Dan, was a co-author of the 2007 book “Made to Stick: Why Some Ideas Survive and Others Die.” It’s why engineers design products ultimately useful only to other engineers. It’s why managers have trouble convincing the rank and file to adopt new processes. And it’s why the advertising world struggles to convey commercial messages to consumers.
“I HAVE a DVD remote control with 52 buttons on it, and every one of them is there because some engineer along the line knew how to use that button and believed I would want to use it, too,” Mr. Heath says. “People who design products are experts cursed by their knowledge, and they can’t imagine what it’s like to be as ignorant as the rest of us.”
But there are proven ways to exorcise the curse.
Sound splitting. 
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