"... people in the survey who had the most exposure to Fox News were more likely to believe falsehoods and rumors about national and world affairs ..."

But it is hard to say what is cause and what is effect....as in, "Does country music make folks voices sound like that, or do folks with those kind of voices tend to sing country music?"

*I* tend to suspect that those with certain mind-sets about certain topics tend to go to places like Fox where someone is agreeing with their prejudices presuppositions...and from there, they just add more & more bad reasons for believing the way they wish to.
Lordy...it 'may' be basic DNA! ☺