Question

Because people generally consume media that reinforces their existing beliefs, it takes broad coverage with an unambiguous message to change peoples' minds. what does the textbook call this phenomenon?

Answer 1

I believe the answer is: Loud signal
The consumption is perpetuated by media company's effort to cater their news in a way that suitable to a certain group of people with specific political assignment. This make it a lot harder for consumers to distinguish which of the news are factual and which are opinionated