Hostile media effect
The hostile media effect, originally deemed the hostile media phenomenon and sometimes called hostile media perception, refers to the tendency for individuals with a strong preexisting opinion on an issue to perceive media coverage as biased against their position's side and favorable of their antagonists' point of view. Partisans from opposite sides of an issue will tend to find the same coverage to be biased against them. The phenomenon was first proposed and experimentally studied in the 1980s by Robert Vallone, Lee Ross and Mark Lepper.