Pillar II
Social Psychology & Group Dynamics.
How belonging, cohesion, and the presence of others bend individual judgement toward the collective — conformity, diffusion of responsibility, and the pathologies of the herd.
25 entries ·search the index →
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Conformity
The alignment of individual belief, judgement, or behaviour with a group's norms — frequently against a person's own perception and better judgement.
- #Social Influence
- #Norms
- #Group Behaviour
125+ found this interesting
Groupthink
The psychological phenomenon where the desire for harmony in a group overrides realistic appraisal of alternatives.
- #Conformity
- #Decision-Making
- #Group Dynamics
100+ found this interesting
In-Group / Out-Group Bias
The systematic tendency to favour members of one's own group and to treat outsiders with suspicion, indifference, or hostility — often on the basis of trivial distinctions.
- #Identity
- #Tribalism
- #Bias
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Bystander Effect
The finding that the more people witness an emergency, the less likely any one of them is to intervene — because responsibility is diffused across the crowd.
- #Responsibility
- #Intervention
- #Emergencies
75+ found this interesting
Pluralistic Ignorance
The shared, false belief that everyone else privately holds a norm or opinion that, in reality, almost no one holds — because everyone is publicly pretending.
- #Norms
- #Misperception
- #Silence
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Deindividuation
The loosening of self-awareness and personal accountability in a crowd or anonymous setting, freeing behaviour normally constrained by identity and consequences.
- #Crowds
- #Anonymity
- #Self-Awareness
50+ found this interesting
Social Loafing
The tendency for individuals to exert less effort when working collectively than when individually accountable for the same task.
- #Teams
- #Accountability
- #Productivity
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Group Polarization
Group discussion reliably pushes people toward more extreme versions of their starting lean — deliberation amplifies opinions rather than moderating them.
- #Group Dynamics
- #Extremism
- #Deliberation
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Information Cascades
When people act in sequence, each rationally ignoring their own private information and copying those before them — until the group's direction is completely divorced from the truth anyone actually knows.
- #Herding
- #Decision-Making
- #Uncertainty
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Bandwagon Effect
The probability of adopting a belief, product, or position rises as more people have already adopted it — popularity functioning as its own argument.
- #Herding
- #Adoption
- #Markets
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Threshold Model of Collective Behaviour
Each person has a personal tipping point — a number of others who must act before they join — and a crowd's fate depends on whether an unbroken chain of thresholds connects the radicals to the mainstream.
- #Collective Action
- #Tipping Points
- #Protest
100+ found this interesting
Emergent Norm Theory
Crowds are not mindless: when a novel situation has no script, a new set of norms emerges on the fly from a few visible actors — and the crowd coordinates around it.
- #Crowds
- #Norms
- #Collective Behaviour
125+ found this interesting
Emotional Contagion
Emotions spread between people automatically — through mimicry of expression, posture, and voice — so that groups converge on shared affective states without anyone deciding to feel them.
- #Emotion
- #Contagion
- #Groups
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Ostracism
Being excluded — ignored, avoided, or cut off — activates measurable distress closer to physical pain than to embarrassment, making the threat of exclusion the group's most efficient discipline.
- #Exclusion
- #Groups
- #Punishment
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Herd Behaviour
The tendency of individuals to follow the movements and decisions of the crowd — the aggregate phenomenon that small decisions, made by imitation, become large movements no one planned.
- #Herding
- #Crowds
- #Collective Behaviour
125+ found this interesting
Homophily
Birds of a feather flock together — but the mechanism is a two-stage filter: people prefer similar company, and similar people are also structurally forced together; the visible result is society's sorting into clusters.
- #Networks
- #Segregation
- #Belonging
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Gatekeeping
The active policing of who may belong: groups raise barriers, test purity, and enforce shibboleths to protect status, distinctiveness, and whatever their membership is worth.
- #Belonging
- #Status
- #Boundaries
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Precarious Manhood
Manhood, unlike womanhood, is widely treated as a status that must be won and can always be lost — a precarious condition that drives performance, policing, and aggression.
- #Gender
- #Status
- #Masculinity
100+ found this interesting
Prevention Paradox
Most cases of a common harm come from the many people at slight risk, not the few at high risk — so targeting only the high-risk minority misses the bulk of the problem.
- #Public Health
- #Prevention
- #Risk
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Relative Deprivation
Grievance is measured against a reference group, not against absolute conditions — people can be objectively better off and subjectively worse off at the same time.
- #Inequality
- #Comparison
- #Grievance
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Status Anxiety
The chronic fear of being judged as inferior — a social emotion that drives consumption, overwork, and conformity long after material needs are met.
- #Status
- #Anxiety
- #Hierarchy
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Collective Narcissism
The belief that one's own group is exceptional and underappreciated — a collective self-esteem that demands constant admiration and reacts with hostility to any criticism.
- #In-Group
- #Nationalism
- #Pride
100+ found this interesting
Relational Aggression
Aggression that damages others through their relationships rather than their bodies — exclusion, rumour, and social manipulation — often invisible to authorities and devastating to targets.
- #Aggression
- #Exclusion
- #Relationships
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Abilene Paradox
A group collectively decides on a course of action that none of its members actually wants — because each person misreads the others' preferences and goes along to avoid conflict.
- #Group Decisions
- #Consensus
- #Silence
100+ found this interesting
Micro & Macro Deviance
Deviance operates at two levels: micro-deviance violates the norms of one's immediate group, while macro-deviance violates the norms of society at large — and the two carry very different costs.
- #Deviance
- #Norms
- #Identity
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