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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.

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.

Social Exchange Theory

Social Exchange Theory

We have discussed why we form relationships, what attracts us to others, and different types of love. But what determines whether we are satisfied with and stay in a relationship? One theory that provides an explanation is social exchange theory. According to social exchange theory, we act as naïve economists in keeping a tally of the ratio of costs and benefits of forming and maintaining a relationship with others (Rusbult & Van Lange, 2003).

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 Loafing

Another way in which a group presence can affect performance is social loafing—the exertion of less effort by a person working together with a group. Social loafing occurs when our individual performance cannot be evaluated separately from the group. Thus, group performance declines on easy tasks (Karau & Williams, 1993). Essentially individual group members loaf and let other group members pick up the slack. Because each individual’s efforts cannot be evaluated,...

Relationship Formation

Relationship Formation

What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...

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Related Experiment Video

Updated: Sep 17, 2025

Integrating Computerized Linguistic and Social Network Analyses to Capture Addiction Recovery Capital in an Online Community

Integrating Computerized Linguistic and Social Network Analyses to Capture Addiction Recovery Capital in an Online Community

Published on: May 31, 2019

Perceived community alignment increases information sharing.

Elisa C Baek^1,2, Ryan Hyon³, Karina López³

¹Department of Psychology, University of Southern California, Los Angeles, CA, USA. elisa.baek@usc.edu.

Nature Communications

|July 1, 2025

Summary

This summary is machine-generated.

People share information to foster a shared reality. Studies show individuals share content they believe others will interpret similarly, strengthening social bonds and understanding.

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Area of Science:

Social Psychology
Neuroscience
Communication Studies

Background:

Information sharing is crucial for social cohesion and establishing a shared reality.
Understanding the motivations behind information sharing is key to social connection.

Purpose of the Study:

To investigate if people preferentially share information expected to be interpreted similarly by their social circles.
To examine the link between neural response similarity and information sharing behavior.

Main Methods:

Utilized neuroimaging data from participants viewing film clips.
Conducted two behavioral studies to assess sharing likelihood based on perceived interpretational similarity.

Main Results:

Higher similarity in neural responses correlated with increased content sharing.
People are more inclined to share content when they anticipate similar interpretations from their social network.
Perceived similarity with others directly boosts the likelihood of sharing information.

Conclusions:

Findings support the theory that information sharing aims to create and reinforce shared understanding.
This drive for shared understanding is fundamental for maintaining social connection and group cohesion.