How digital media drive affective polarization through partisan sorting

Törnberg, P. (2022).

PNAS of the United States of America,

119(42).

https://doi.org/10.1073/pnas.2207159119

Abstract

Politics has in recent decades entered an era of intense polarization. Explanations have implicated digital media, with the so-called echo chamber remaining a dominant causal hypothesis despite growing challenge by empirical evidence. This paper suggests that this mounting evidence provides not only reason to reject the echo chamber hypothesis but also the foundation for an alternative causal mechanism. To propose such a mechanism, the paper draws on the literatures on affective polarization, digital media, and opinion dynamics. From the affective polarization literature, we follow the move from seeing polarization as diverging issue positions to rooted in sorting: an alignment of differences which is effectively dividing the electorate into two increasingly homogeneous megaparties. To explain the rise in sorting, the paper draws on opinion dynamics and digital media research to present a model which essentially turns the echo chamber on its head: it is not isolation from opposing views that drives polarization but precisely the fact that digital media bring us to interact outside our local bubble. When individuals interact locally, the outcome is a stable plural patchwork of cross-cutting conflicts. By encouraging nonlocal interaction, digital media drive an alignment of conflicts along partisan lines, thus effacing the counterbalancing effects of local heterogeneity. The result is polarization, even if individual interaction leads to convergence. The model thus suggests that digital media polarize through partisan sorting, creating a maelstrom in which more and more identities, beliefs, and cultural preferences become drawn into an all-encompassing societal division.

Significance

Recent years have seen a rapid rise of affective polarization, characterized by intense negative feelings between partisan groups. This represents a severe societal risk, threatening democratic institutions and constituting a metacrisis, reducing our capacity to respond to pressing societal challenges such as climate change, pandemics, or rising inequality. This paper provides a causal mechanism to explain this rise in polarization, by identifying how digital media may drive a sorting of differences, which has been linked to a breakdown of social cohesion and rising affective polarization. By outlining a potential causal link between digital media and affective polarization, the paper suggests ways of designing digital media so as to reduce their negative consequences.

Filling in the Gaps: False Memories and Partisan Bias

Armaly, M.T. & Enders, A.

Political Psychology, Vol. 0, No. 0, 2022

doi: 10.1111/pops.12841

Abstract

While cognitive psychologists have learned a great deal about people's propensity for constructing and acting on false memories, the connection between false memories and politics remains understudied. If partisan bias guides the adoption of beliefs and colors one's interpretation of new events and information, so too might it prove powerful enough to fabricate memories of political circumstances. Across two studies, we first distinguish false memories from false beliefs and expressive responses; false political memories appear to be genuine and subject to partisan bias. We also examine the political and psychological correlates of false memories. Nearly a third of respondents reported remembering a fabricated or factually altered political event, with many going so far as to convey the circumstances under which they “heard about” the event. False-memory recall is correlated with the strength of partisan attachments, interest in politics, and participation, as well as narcissism, conspiratorial thinking, and cognitive ability.

Conclusion

While cognitive psychologists have learned a great deal about people’s propensity for constructing and acting on false memories, the role of false memories in political attitudes has received scant attention. In this study, we built on previous work by investigating the partisan foundations and political and psychological correlates of false memories. We found that nearly a third of respondents reported remembering a fabricated or factually altered political event. These false memories are not mere beliefs or expressive responses; indeed, most respondents conveyed where they “heard about” at least one event in question, with some providing vivid details of their circumstances. We also found that false memory is associated with the strength of one’s partisan attachments, conspiracism, and interest in politics, among other factors.

Altogether, false memories seem to behave like a form of partisan bias: The more in touch one is with politics, especially the political parties, the more susceptible they are to false- memory construction. While we cannot ascribe causality, uncovering this (likely) mechanism has several implications. First, the more polarized we become, the more likely individuals may be to con-struct false memories about in-  and outgroups. In turn, the falser memories one constructs about the greatness of one’s ingroup and the evil doings of the outgroup, the higher the temperature of polarization rises. Second, false- memory construction may be one mechanism by which mis-information takes hold psychologically. By exposing people to information they are motivated to believe, skilled traffickers of misinformation may be able to not only convince one to be-lieve something but convince them that something which never transpired actually did so. The conviction that accompanies memory— people’s natural tendency to believe their memories are trustworthy— makes false memories a particularly pernicious route by which to manipulate those subject to this bias. Indeed, this is precisely the concern presented by “deepfakes”— images and videos that have been expertly altered or fabricated for the purpose of exploiting targeted viewers. Finally, and relatedly, politicians may be able to induce false memories, strategically molding a past reality to suit their political will.

The research is here.