While, in its most literal sense, an echo chamber is an enclosed space where sounds reverberate by bouncing off walls, in the context of mass media, it is a metaphor describing the phenomenon of a single message or story being repeated by many like-minded media outlets. The effect of a media echo chamber is to amplify and corroborate a message, often uncritically, through as many channels as possible. This results in a story that seems plausible and important due to the number of media outlets repeating it but may not be newsworthy or even credible information. In politics, the media echo chamber is often used to spin a story, to discredit a political opponent, to control the messaging on an issue, or to justify ...

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