When kids in a Nabisco focus group told researchers that they always separated their Oreos before they ate them, the researchers recommended that the company develop a cookie that couldn't be taken apart. Fortunately, in this case, Nabisco didn't heed the researchers' advice. Each year, companies spend a billion dollars on focus groups designed to ferret out consumer motivation, and, according to expert Bonnie Goebert, in many cases they're throwing their money away. In this fascinating book,...