"We show that these effects stem in part from a bias we call partisan coverage filtering, wherein partisan outlets selectively report information, leading viewe

"We show that these effects stem in part from a bias we call partisan coverage filtering, wherein partisan outlets selectively report information, leading viewers to learn a biased set of facts." I'm all for science and experimentation, but uh... duh? I thought we already knew this, since there's been a term for it for a long time: selection bias. Or are they saying they discovered that biased media specifically works on selection bias? Because I thought that was pretty obvious, too.