It appears it didn't change their pre-existing ratings of those sources. From the article: The study, published today in the journal Palgrave Communications,

It appears it didn't change their pre-existing ratings of those sources. From the article: The study, published today in the journal Palgrave Communications, showed the perceived reliability of real-life fanfic before playing the game had reduced by an average of 21% after completing it. Yet the game made no difference to how users ranked real news.