Group Behavior

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Altruism

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The selfless concern for the well-being of others without expecting any reward.

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Bystander Effect

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A social psychological phenomenon where individuals are less likely to offer help to a victim when other people are present.

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Deindividuation

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A concept in social psychology that is generally thought of as the loss of self-awareness in groups, leading to a decrease in personal responsibility.

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Diffusion of Responsibility

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A sociopsychological phenomenon whereby a person is less likely to take responsibility for action or inaction when others are present.

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Groupthink

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A psychological phenomenon that occurs within a group of people in which the desire for harmony or conformity results in an irrational or dysfunctional decision-making outcome.

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Group Polarization

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The tendency for a group to make decisions that are more extreme than the initial inclination of its members.

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Social Facilitation

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The tendency for people to perform differently when in the presence of others than when alone, typically performing better on simple or well-rehearsed tasks.

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Social Inhibition

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The tendency to perform worse on complex or new tasks when in the presence of others.

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Social Loafing

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The phenomenon of people exerting less effort to achieve a goal when they work in a group than when they work alone.