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Group Polarization

Group Polarization

Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.

Confirmation Biases

Confirmation Biases

The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?

Groupthink

Groupthink

When in group settings, we are often influenced by the thoughts, feelings, and behaviors around us. Groupthink is another phenomenon of conformity where modification of the opinions of members in a group aligns with what they believe is the group consensus (Janis, 1972). In such situations, the group often takes action that individuals would not perform outside the group setting because groups make more extreme decisions than individuals do. Moreover, groupthink can hinder opposing trains of...

In- and Out-Groups

In- and Out-Groups

People all belong to a gender, race, age, and social economic group. These groups provide a powerful source of our identity and self-esteem (Tajfel & Turner, 1979) and serve as our in-groups. An in-group is a group that we identify with or see ourselves as belonging to.

Social Proof

Social proof is a form of persuasion based on comparison and conformity. People compare their behavior and actions to what others are doing and will change to conform to do what their peers do.

Bias

Bias

Bias refers to any tendency that prevents a question from being considered unprejudiced. In research, bias occurs when one outcome or answer is selected or encouraged over others in sampling or testing. Bias can occur during any research phase, including study design, data collection, analysis, and publication.
In statistics, a sampling bias is created when a sample is collected from a population, and some members of the population are not as likely to be chosen as others (remember, each member...

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Related Experiment Video

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Continuous Theta Burst Stimulation of the Posterior Medial Frontal Cortex to Experimentally Reduce Ideological Threat Responses

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The preference for belief, issue polarization, and echo chambers.

Bert Baumgaertner¹, Florian Justwan¹

¹Department of Politics and Philosophy, University of Idaho, Moscow, USA.

Synthese

|October 24, 2022

Summary

Issue polarization can arise from a simple preference for belief, not just exclusion. This finding suggests interventions targeting open-mindedness may be less effective than expected for complex societal issues.

Keywords:

Echo chambers Epistemic bubbles Homophily Issue polarization Mechanisms of exclusion Motivated reasoning Preference for belief Preference for certainty

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Last Updated: Aug 24, 2025

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Published on: September 28, 2018

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Area of Science:

Social Science
Computational Social Science
Network Science

Background:

Issue polarization and echo chambers are often explained by social or cognitive exclusion mechanisms.
Interventions typically focus on promoting open-mindedness and avoiding epistemic bubbles.

Purpose of the Study:

To investigate alternative mechanisms driving issue polarization beyond exclusion.
To model how a preference for belief can lead to polarization in epistemic communities.
To assess the impact of cognitive exclusion mechanisms on polarization.

Main Methods:

Development of a network model with an empirically-validated structure.
Simulation of belief dynamics incorporating a preference for belief and community structures.
Inclusion of biased assimilation and motivated reasoning as cognitive exclusion mechanisms.

Main Results:

A preference for belief, even when weak, can cause significant issue polarization.
Initial small inequalities in belief distributions can lead to full polarization.
Exclusion mechanisms can worsen polarization but are not its primary cause.

Conclusions:

Issue polarization may stem more from the initial spread of information than from exclusion.
Current interventions targeting open-mindedness might have limited effectiveness.
Issue polarization could be a more intractable problem than previously thought.