Before there was television people used to get their news from the radio. Now television uses images in order to get a news story across. However, just like television is a medium that delivers a specific type of message other news media sources also deliver a pecific type of message. Therefore, I believe McLuhan idea has evolved since radio and television were the primary forms of media. Nowadays, newspaper, television newscasts, and magazines have more power over what types of messages they can give a person. This makes it a person's job to decipher between the different types of media and know which ones are credible and which ones are less credible.
McLuhan's idea seems accurate in that most of the time people know which types of media to avoid. For example, an article in Star Magazine will not have the same journalistic integrity that an article in Newsweek will have. McLuhan believed that television changed the way messages could be sent and also what messages could be sent. Nowadays, news sources know the power that images have. This is why they always flock to things like accidents and robberies. They meant to get the shot that will make a great top story. Unfortuntaley, some news sources also know how dependent people are on their stories. Some of those news sources try and take advantage of that.
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