New research suggests that when you test people in isolation, you get different results. When it comes to the cognitive reflection test, reasoning alone, 83% of people who have taken this test under laboratory conditions answer at least one of the problems incorrectly. In groups of three or more, usually the entire group will change their minds from the wrong answer to the right answer. That's because at least one member will see the correct answer, and the resulting debate will lead those who are wrong, which is usually most people, to change their minds.