Why Do People Persist in Believing Things That Just Aren't True? : The New Yorker - 1 views
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Last month, Brendan Nyhan, a professor of political science at Dartmouth, published the results of a study that he and a team of pediatricians and political scientists had been working on for three years. They had followed a group of almost two thousand parents, all of whom had at least one child under the age of seventeen, to test a simple relationship: Could various pro-vaccination campaigns change parental attitudes toward vaccines? Each household received one of four messages: a leaflet from the Centers for Disease Control and Prevention stating that there had been no evidence linking the measles, mumps, and rubella (M.M.R.) vaccine and autism; a leaflet from the Vaccine Information Statement on the dangers of the diseases that the M.M.R. vaccine prevents; photographs of children who had suffered from the diseases; and a dramatic story from a Centers for Disease Control and Prevention about an infant who almost died of measles. A control group did not receive any information at all. The goal was to test whether facts, science, emotions, or stories could make people change their minds. The result was dramatic: a whole lot of nothing. None of the interventions worked.
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Until recently, attempts to correct false beliefs haven’t had much success. Stephan Lewandowsky, a psychologist at the University of Bristol whose research into misinformation began around the same time as Nyhan’s, conducted a review of misperception literature through 2012. He found much speculation, but, apart from his own work and the studies that Nyhan was conducting, there was little empirical research. In the past few years, Nyhan has tried to address this gap by using real-life scenarios and news in his studies: the controversy surrounding weapons of mass destruction in Iraq, the questioning of Obama’s birth certificate, and anti-G.M.O. activism. Traditional work in this area has focussed on fictional stories told in laboratory settings, but Nyhan believes that looking at real debates is the best way to learn how persistently incorrect views of the world can be corrected.
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One thing he learned early on is that not all errors are created equal. Not all false information goes on to become a false belief—that is, a more lasting state of incorrect knowledge—and not all false beliefs are difficult to correct. Take astronomy. If someone asked you to explain the relationship between the Earth and the sun, you might say something wrong: perhaps that the sun rotates around the Earth, rising in the east and setting in the west. A friend who understands astronomy may correct you. It’s no big deal; you simply change your belief. But imagine living in the time of Galileo, when understandings of the Earth-sun relationship were completely different, and when that view was tied closely to ideas of the nature of the world, the self, and religion. What would happen if Galileo tried to correct your belief? The process isn’t nearly as simple. The crucial difference between then and now, of course, is the importance of the misperception. When there’s no immediate threat to our understanding of the world, we change our beliefs. It’s when that change contradicts something we’ve long held as important that problems occur.
