Why Smart People Still Believe Conspiracy Theories

Source: Time

By Jeffrey Kluger

November 14, 2017

Millions of Americans believe in conspiracy theories — including plenty of people who you might expect would be smart enough to know better.

Despite mountains of scientific evidence to the contrary, at least 20% of Americans still believe in a link between vaccines and autism, and at least 37% think global warming is a hoax, according to a 2015 analysis. Even more of us accept the existence of the paranormal: 42% believe in ghosts and 41% in extrasensory perception. And those numbers are stable. A 2014 study by conspiracy experts Joseph Uscinski of the University of Miami and Joseph Parent of Note Dame University surveyed 100,000 letters sent to the New York Times and the Chicago Tribune from 1890 to 2010 and found that the percentage that argued for one conspiracy theory or another had barely budged over time.

Now, a study published online in the journal Personality and Individual Differencesprovides new insights into why so many of us believe in things that just aren’t true: In some cases, we simply want to believe.

In the first part of the two-part study, psychologists Thomas Ståhl of the University of Illinois at Chicago and Jan-Willem van Proojien of the Vrije Universiteit Amsterdam recruited 343 people online and had them complete surveys related to the so-called Importance of Rationality Scale (IRS) and the Morality of Rationality Scale (MRS). In the IRS test, they were asked to agree on a scale of 1 to 7 with a series of statements such as, “It is important to me personally to be skeptical about claims that are not backed up by evidence.” For the MRS, the survey included statements like, “Being skeptical about about claims that are not backed up by evidence is a moral virtue.” The people were also asked a number of questions designed to measure their Analytic Cognitive Style (ACS), which basically looks for how much they base conclusions on the presence of facts as opposed to on intuitive leaps.

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