Why psychologists believe that focus groups are far less insightful than some marketers think (Head cannot look into Gut)

‘The heart has its reasons,’ Blaise Pascal wrote more than three centuries ago, ‘which reason knows nothing of’. Sot with the conscious and unconscious minds. Head cannot look into Gut and so it has no idea how Gut assembles its judgments, which is why psychologists believe that focus groups are far less insightful than some marketers think. If you put people together in a room, show them a car commercial, and ask them how they feel about the car, you will get clear answers. ‘I don’t care for it,’ a man may say. Fine. Why not? He frowns. ‘Um, the styling on the front is ugly. And I want a more powerful engine.’ That looks like good insight, just the sort of thing a company can use to design and market its products. But it’s not. This man’s snap judgment – ‘I don’t like that car’ – came from Gut. But the interviewer is talking to Head. And Head doesn’t have a clue why Gut doesn’t like the car. So Head rationalizes. It looks at the conclusion and cobbles together an explanation that is both plausible and quite possibly, wrong.

Excerpt from: Risk: The Science and Politics of Fear by Dan Gardner