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Groupthink is a mode of thinking where the desire for conformity and unanimity in a cohesive group overrides alternative and realistic decisions. Groups often make more extreme decisions than individuals would alone because members suppress dissenting opinions to maintain harmony. This elimination of diverse viewpoints contributes to faulty group decisions and hinders critical thinking.

Individuals suppress or censor their true opinions to fit in and avoid discomfort, resentment, or feeling like an outcast. The fear of being ostracized may cause stress that rationalizes members to act with misguided notions. This self-censorship occurs because maintaining group harmony becomes more important than voicing alternative perspectives.

The illusion of invulnerability is a symptom where group members feel protected from outside opinions and believe the group can do no wrong. Members won't be mocked from inside the group and perceive themselves as invincible. This false sense of security prevents the group from considering realistic risks or alternative viewpoints.

Groupthink occurs when groups are highly cohesive and prioritize harmony over sound decisions. Directive leaders who make their opinions known discourage disagreement. Isolation from alternative viewpoints also increases groupthink likelihood. These causes are preventable through awareness and deliberate strategies to encourage diverse perspectives.

Leaders should diminish their presence to avoid swaying members' opinions and withhold position statements until all members voice views. Groups can consult trusted outsiders for unbiased perspectives, conduct private voting, research all viewpoints, and develop contingency plans. These strategies keep broader perspectives alive and improve group decision-making quality.

Groupthink can cause members to develop stereotypes and hold negative attitudes toward out-group members or those with differing viewpoints. Members may rationalize that they're the best while labeling outsiders as losers. These beliefs can spread through popular media, where others reinforce the message and discourage dissent, further entrenching group biases.

Groupthink and group polarization both involve groups moving toward extreme positions. In groupthink, members suppress dissent to maintain unanimity, while group polarization strengthening opinion through group discussion can intensify initial viewpoints. Both phenomena demonstrate how group settings influence individual thinking and can lead to more extreme collective decisions than members would make independently.