Hidden Brain
Hidden Brain

Group Think

How do the groups you identify with shape your sense of self? Do they influence the beer you buy? The way you vote? In this favorite episode from 2021, psychologist Jay Van Bavel explains how our group loyalties affect us more than we realize, and can even shape our basic senses of sight, taste and

Featured Speakers

Shankar Vedantam Host

Topics Discussed

Episode Summary

Executive Summary: The episode argues that group identities powerfully shape perception, preference, and behavior—sometimes uniting enemies, sometimes fueling prejudice. Through research and stories from sports, politics, and social media, it shows how identities can be deliberately activated or redesigned to promote cooperation, resilience, and social harmony, while also warning that tribalism can distort reality and deepen division.

Main Topics: Mandela and the unifying power of symbolic group identity (Priority: 5/5): Nelson Mandela used the Rugby World Cup and the Springboks to recast a hated symbol of apartheid into a shared national emblem, helping black and white South Africans see themselves as one team. How group identity shapes preferences and perception (Priority: 5/5): Van Bevel explains that identity changes what people like, smell, see, and judge—illustrated by maple syrup preference, the stinky-shirt study, and sports-fan perception biases. Arbitrary groups can quickly create loyalty and bias (Priority: 5/5): Even trivial assignments, like liking Klee vs. Kandinsky, can trigger in-group favoritism, showing how easily humans form coalitions and discriminate against outsiders. Polarization, out-group hate, and distorted reality (Priority: 5/5): The conversation explores how political and social divisions increasingly center on moralized hatred of the other side, affecting families, dating, voting, and interpretation of evidence. Using shared goals and crisis to build bonds (Priority: 4/5): Stressful or cooperative experiences—such as a choking incident, hijacking survival, sports teams, or mixed-religion soccer leagues—can create solidarity across divides. Social media and misinformation amplify tribal instincts (Priority: 4/5): Platforms reward moralized, anti-out-group language, making divisive content more viral and reducing the effectiveness of simple fact-checking among political extremists. Morbid curiosity and scary play as social regulation (Priority: 4/5): The second half shifts to Colton Scrivner’s work on horror and true crime, arguing that frightening media can help people learn, cope, feel less alone, and regulate anxiety when consumed in moderation.

Key Arguments: Group identities are not just labels; they act as lenses that shape perception, taste, and judgment. Being a minority in a setting makes identity more salient and can create instant connection with strangers. People favor in-group members even when group membership is arbitrary and meaningless. Out-group threat can distort spatial and social judgments, making enemies seem closer or larger than they are. Political polarization increasingly operates through moralized out-group hate rather than mere disagreement. Social media rewards language that attacks the other side, reinforcing tribal behavior. Shared goals, rituals, and crisis can transform strangers into allies and reduce prejudice. Scary media can be psychologically useful because it packages fear into a bounded, controllable experience that can build resilience or help with emotional regulation.

Data Points: Rugby World Cup final score: South Africa 15-12 New Zealand - Mandela’s symbolic use of the Springboks culminated in a national victory that united black and white South Africans. Maple syrup preference shift: Participants primed with Canadian identity preferred maple syrup over honey - Ottawa study showing identity salience changes taste preferences. Stinky-shirt disgust effect: Out-group shirt judged much more disgusting than in-group shirt - University of Sussex study using rival university logos on the same sweaty shirt. Tajfel minimal-group finding: Randomly assigned youths favored in-group members and maximized difference between groups - Classic Klee vs. Kandinsky study on arbitrary group formation. Thanksgiving dinner length: Roughly half an hour shorter - Political disagreement is making family gatherings shorter over time. Dating discrimination: Biggest observed form was refusing to date someone who voted for the other party - Study conducted around Trump’s inauguration in New York City. Hate-crime reduction around Liverpool: 16% drop - Salma Musa’s findings after Mohamed Salah became a Liverpool star. Anti-Muslim tweets among Liverpool fans: Nearly half as many - Observed reduction compared with fans from other groups. Social media sharing boost: 15% to 20% more likely to share - Powerful moral-emotional language increases virality. Out-group dunking virality: 67% more likely to get shared - Biggest single predictor of virality in a new study. Attention economy scrolling: 300 feet of news feed per day - Average social media user scroll depth described as the height of the Statue of Liberty.

Pivotal Quotes: "Took a symbol of oppression and used it as a symbol of togetherness." — Jay Van Bevel: Describing Mandela’s use of the Springboks during the Rugby World Cup. "These identities are a lens that shape all kinds of our senses." — Jay Van Bevel: Explaining how group identity affects smell, sight, and interpretation. "The biggest single predictor of making something go viral is dunking on the out-group." — Jay Van Bevel: Discussing social media dynamics and polarization.

Implications: Listeners are urged to notice how identities shape judgment and to intentionally build shared goals, rituals, and cross-group contact. For media and institutions, the lesson is to design for cooperation, not just engagement or outrage.

🔓 Sign Up for Unlimited Episode Search

About Hidden Brain

Why do I feel stuck? How can I become more creative? What can I do to improve my relationships? If you’ve ever asked yourself these questions, you’re not alone. On Hidden Brain, we help you understand your own mind — and the minds of the people around you. (We're routinely rated the #1 science podcast in the United States.) Hosted by veteran science journalist Shankar Vedantam.

View all episodes from Hidden Brain