The past two election cycles have seen an explosion of attention given to “echo chambers,” or communities where a narrow set of views makes people less likely to challenge their own opinions. Much of this concern has focused on the rise of social media, which has radically transformed the information ecosystem.
However, when scientists investigated social media echo chambers, they found surprisingly little evidence of them on a large scale – or at least none on a scale large enough to warrant the growing concerns. And yet, selective exposure to news does increase polarization. This suggested that these studies missed part of the picture of Americans’ news consumption patterns. Crucially, they did not factor in a major component of the average American’s experience of news: television.
To fill in this gap, I and a group of researchers from Stanford University, the University of Pennsylvania, and Microsoft Research tracked the TV news consumption habits of tens of thousands of American adults each month from 2016 through 2019. We discovered four aspects of news consumption that, when taken together, paint an unsettling picture of the TV news ecosystem.
TV trumps online
We first measured just how politically siloed American news consumers really are across TV and the web. Averaging over the four years of our observations, we found that roughly 17% of Americans are politically polarized – 8.7% to the left and 8.4% to the right – based on their TV news consumption. That’s three to four times higher than the average percentage of Americans polarized by online news.
Moreover, the percentage of Americans polarized via TV ranged as high as 23% at its peak in November 2016, the month in which Donald Trump was elected president. A second spike occurred in the months leading into December 2018, following the “blue wave” midterm elections in which a record number of Democratic campaign ads were aired on TV. The timing of these two spikes suggests a clear connection between content choices and events in the political arena.
The 2018 midterm elections saw campaign ads reach new levels of partisanship.
Staying in TV echo chambers
Besides being more politically siloed on average, our research found that TV news consumers are much more likely than web consumers to maintain the same partisan news diets over time: after six months, left-leaning TV audiences are 10 times more likely to remain segregated than left-leaning online audiences, and right-leaning audiences are 4.5 times more likely than their online counterparts.
While these figures may seem intimidating, it is important to keep in mind that even among TV viewers, about 70% of right-leaning viewers and about 80% of left-leaning viewers do switch their news diets within six months. To the extent that long-lasting echo chambers do exist, then, they include only about 4% of the population.
Narrow TV diets
Partisan segregation among TV audiences goes even further than left- and right-leaning sources, we found. We identified seven broad buckets of TV news sources, then used these archetypes to determine what a typical unvaried TV news diet really looks like.
We found that, compared to online audiences, partisan TV news consumers tend not to stray too far from their narrow sets of preferred news sources. For example, most Americans who consume mostly MSNBC rarely consume news from any other source besides CNN. Similarly, most Americans who consume mostly Fox News Channel do not venture beyond that network at all. This finding contrasts with data from online news consumers, who still receive sizable amounts of news from outside their main archetype.
Distilling partisanship
Finally, we found an imbalance between partisan TV news channels and the broader TV news environment. Our observations revealed that Americans are turning away from national TV news generally in substantial numbers – and crucially, this exodus is more from centrist news buckets than from left- or right-leaning ones. Within the remaining TV news audience, we found movement from broadcast news to cable news, trending toward MSNBC and Fox News.
Together, these trends reveal a counterintuitive finding: Although the overall TV news audience is shrinking, the partisan TV news audience is growing. This means that the audience as a whole is in the process of being “distilled” – remaining TV viewers are growing increasingly partisan, and the partisan proportion of TV news consumers is on the rise.
Why it matters
Exposure to opposing views is critical for functional democratic processes. It allows for self-reflection and tempers hostility toward political outgroups, whereas only interacting with similar views in political echo chambers makes people more entrenched in their own opinions. If echo chambers truly are as widespread as recent attention has made them out to be, it can have major consequences for the health of democracy.
Our findings suggest that television – not the web – is the top driver of partisan audience segregation among Americans. It is important to note that the vast majority of Americans still consume relatively balanced news diets.
However, given that the partisan TV news audience alone consumes more minutes of news than the entire online news audience, it may be worth devoting more attention to this huge and increasingly politicized part of the information ecosystem.
Homa Hosseinmardi no recibe salario, ni ejerce labores de consultoría, ni posee acciones, ni recibe financiación de ninguna compañía u organización que pueda obtener beneficio de este artículo, y ha declarado carecer de vínculos relevantes más allá del cargo académico citado.
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Interest. Very interest. However, I feel that I must point out that the effects of both cable news and social media, like PT Barnum’s demise, have been greatly exageriated. The reality is that the audience for cable news outlets combined is less than two percent of the countries total population. The vast majority of people don’t get their news from Fox, CNN and MSNBC. The vast majority of viewers get their news for thier local television station and those outlets do a poor job of explaining national issues; which keeps the vast majority of voters uninformed. Which is why we end up getting people like Matt gEotz and Magorie Taylor Greene elected to office.
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Media Bias/Fact Check (MBFC) is an American website founded in 2015 by editor Dave M. Van Zandt. It uses a 0–10 scale to rate sites in two areas: bias and factual accuracy 1. The website has been cited by various media outlets such as The New York Times, The Washington Post, and CNN 1.
There are also other websites that provide media bias charts such as Ad Fontes’ media bias chart and AllSides’ media bias chart 23. These charts claim to show the political lean and credibility of news organizations. However, it is important to note that these charts are subjective and may not be completely accurate 2.
Media Bias/Fact Check (MBFC) is an American website founded in 2015 by editor Dave M. Van Zandt. It uses a 0–10 scale to rate sites in two areas: bias and factual accuracy 1. The website has been cited by various media outlets such as The New York Times, The Washington Post, and CNN Car Games.
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