“Fake news” is Donald Trump’s favorite catchphrase. Since the election, it has appeared in some 180 tweets by the President, decrying everything from accusations of sexual assault against him to the Russian collusion investigation to reports that he watches up to eight hours of television a day. Trump may just use “fake news” as a rhetorical device to discredit stories he doesn’t like, but there is evidence that real fake news is a serious problem. As one alarming example, an analysis by the internet media company Buzzfeed revealed that during the final three months of the 2016 U.S. presidential campaign, the 20 most popular false election stories generated around 1.3 million more Facebook engagements—shares, reactions, and comments—than did the 20 most popular legitimate stories. The most popular fake story was “Pope Francis Shocks World, Endorses Donald Trump for President.” Fake news can distort people’s beliefs even after being debunked. For example, repeated over and over, a story such as the one about the Pope endorsing Trump can create a glow around a political candidate that persists long after the story is exposed as fake. A study recently published in the journal Intelligence suggests that some people may have an especially difficult time rejecting misinformation. Asked to rate a fictitious person on a range of character traits, people who scored low on a test of cognitive ability continued to be influenced by damaging information about the person even after they were explicitly told the information was false. The study is significant because it identifies what may be a major risk factor for vulnerability to fake news. Ghent University researchers Jonas De keersmaecker and Arne Roets first had over 400 subjects take a personality test. They then randomly assigned each subject to one of two conditions. In the experimental condition, the subjects read a biographical description of a young woman named Nathalie. The bio explained that Nathalie, a nurse at a local hospital, “was arrested for stealing drugs from the hospital; she has been stealing drugs for 2 years and selling them on the street in order to buy designer clothes.” The subjects then rated Nathalie on traits such as trustworthiness and sincerity, after which they took a test of cognitive ability. Finally, the subjects saw a message on their computer screen explicitly stating that the information about Nathalie stealing drugs and getting arrested was not true, and then rated her again on the same traits. The control condition was identical, except that subjects were not given the paragraph with the false information and rated Nathalie only once.
Read More: Scientific American