Genius scientists determine people of low cognitive ability are more vulnerable to fake news
So they proved scientifically that stupid people are stupid! Will scientific wonders never cease?
Actually, it's a little more complicated than I have suggested. They proved that when fake news is debunked, the debunked story is more likely to continue influencing the beliefs of people with lower cognitive ability.
I found this more interesting, if equally obvious:
"Other research is shedding light on the mechanisms underlying the effects of misinformation. Repeating a false claim increases its believability, giving it an air of what Stephen Colbert famously called “truthiness.” Known as the illusion of truth effect, this phenomenon was first demonstrated in the laboratory by Hasher and her colleagues. On each of three days, subjects listened to plausible-sounding statements and rated each on whether they thought it was true. Half of the statements were in fact true, such as Australia is approximately equal in area to the continental United States, whereas the other half were false, such as Zachary Taylor was the first president to die in office (it was William Henry Harrison). Some of the statements were repeated across days, whereas others were presented only once. The results showed that the average truth rating increased from day to day for the repeated statements, but remained constant for the non-repeated statements, indicating that subjects mistook familiarity for verity."
Or in other words, the more you repeat a lie, the more likely are people to believe it.