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  1. Hidden Brain
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Group Think

Group Think

Hidden Brain · Mar 23, 2026

Our group identities shape how we see, think, and act. This episode explores the psychology of 'us vs. them' and how to build a better 'we'.

Criticizing an Out-Group Is the Single Biggest Predictor of Social Media Virality

Social media content that "dunks on" an opposing group is 67% more likely to be shared. This virality is driven by in-group reinforcement, not by persuading outsiders. The platform's algorithm rewards and encourages this divisive behavior.

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Group Think

Hidden Brain·2 months ago

Arbitrary Group Assignments Instantly Create Bias and Prioritize Relative Advantage

The Klee/Kandinsky study shows people favor their "in-group" even when assigned randomly. More surprisingly, they will accept less for their own group if it means the "out-group" gets even less, prioritizing the *difference* over absolute gain.

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Group Think

Hidden Brain·2 months ago

Group Identity Dictates Sensory Perception, Even Smell

A study found people rated the same t-shirt as more disgusting when they believed it belonged to a rival university. This shows our in-group/out-group biases can fundamentally alter basic sensory experiences like smell, not just abstract beliefs.

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Group Think

Hidden Brain·2 months ago

Fact-Checking Fails on People at Political Extremes Because Identity Overpowers Accuracy

While nudging people to focus on accuracy can reduce misinformation sharing for many, new data suggests this approach is ineffective for those with extreme political identities. For these individuals, the need to protect their group identity is stronger than the motivation to be accurate.

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Group Think

Hidden Brain·2 months ago

Diverse Police Forces See Measurable Reductions in Force and Arrests

A large-scale study in Chicago found that Black and Hispanic police officers made fewer stops and arrests and used force less often, particularly when interacting with Black civilians. This provides empirical evidence that increasing diversity in policing directly changes officer behavior.

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Group Think

Hidden Brain·2 months ago

Horror Video Games Can Terminate Acute Anxiety Attacks by Providing a Target for Fear

For some people with anxiety, playing a scary video game provides an appropriate outlet for panic. The game creates a bounded, controllable environment where anxiety "makes sense," allowing them to process the emotion and feel relief. The fear becomes purposeful.

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Group Think

Hidden Brain·2 months ago

Horror Fans Exhibited Greater Psychological Resilience During the COVID-19 Pandemic

A study in April 2020 found that people who regularly consumed frightening media scored better on resilience measures. Their history of engaging with simulated threats appears to provide practice in emotional regulation, helping them cope with the uncertainty of a real-world crisis.

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Group Think

Hidden Brain·2 months ago

Perceived Threats from Out-Groups Literally Distort Perceptions of Physical Space

Studies show Yankees fans perceive Boston's Fenway Park as physically closer than it is, and people threatened by immigration see Mexico City as closer. This demonstrates that psychological threats from out-groups can warp our fundamental perception of distance.

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Group Think

Hidden Brain·2 months ago

Objective Video Evidence Fails When In-Group Bias Controls Interpretation

Body cameras don't resolve police-civilian disputes because viewers' group identities determine what they see. Jurors identifying with police focus on the suspect's faults, while others focus on the officer's, leading to opposite conclusions from the same footage.

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Group Think

Hidden Brain·2 months ago

Horror Fans Fall into Three Categories: Adrenaline Junkies, White Knucklers, and Dark Copers

Not all horror fans seek an adrenaline rush. "White Knucklers" enjoy the feeling of *overcoming* fear, not the fear itself. "Dark Copers" use the genre to process difficult emotions like anxiety and depression. This typology reveals the diverse psychological needs that scary media fulfill.

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Group Think

Hidden Brain·2 months ago

A High-Performing In-Group Member Can Reduce Prejudice Against Their Entire Out-Group

When Muslim soccer star Mo Salah joined Liverpool, hate crimes in the area dropped 16% and anti-Muslim tweets from fans fell by half. By becoming a beloved "in-group" hero, Salah changed the group's norms to be more inclusive of his religion.

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Group Think

Hidden Brain·2 months ago