Groupthink is a psychological phenomenon that occurs within a group of people when the desire for harmony and conformity leads to irrational or dysfunctional decision-making. This concept has been a focus of research and discussion since it was first introduced in the 1970s by psychologist Irving Janis. Groupthink arises when group members prioritize consensus over critical analysis, causing them to overlook potential problems and alternative viewpoints.

Understanding the causes and symptoms of groupthink is crucial for organizations and teams, as it can have detrimental consequences on their decision-making process and overall performance. There are several historical examples of groupthink, such as the Bay of Pigs invasion and the Challenger Space Shuttle disaster, which showcase the possible devastating outcomes when groupthink takes over. To prevent and manage groupthink, it is essential to promote a culture that encourages open dialogue, constructive criticism, and diverse perspectives.

Key Takeaways

  • Groupthink occurs when the desire for harmony leads to irrational decision-making within a group
  • Awareness of causes and symptoms can help organizations prevent the negative consequences of groupthink
  • Encouraging open dialogue, criticism, and diverse perspectives can mitigate groupthink and improve decision-making.

Understanding Groupthink

Definition and Origin

Groupthink is a term coined by social psychologist Irving Janis in the 1970s to describe the phenomenon of faulty decision-making that can take place within highly cohesive groups. It is often characterized by a strong desire for consensus, unanimity, and conformity, which can severely hinder the group’s ability to critically evaluate their situation and make sound decisions. Groupthink frequently arises due to pressures from outside forces or internal group dynamics which limit the consideration of alternative perspectives or dissenting opinions.

Psychological Phenomenon

The psychology behind groupthink is driven by the human need to belong, be accepted, and maintain harmony within a group. Group members may suppress their own doubts or differing views out of fear of rejection or ostracization. The stronger the group cohesion, the higher the risk for groupthink to occur.

Some common symptoms of groupthink include:

  • Illusion of invulnerability: Group members believe they are untouchable, leading to overconfidence and unrealistic optimism.
  • Collective rationalization: The group dismisses warnings or negative feedback, justifying any contradictory information.
  • Pressure on dissenters: Group members who express dissenting opinions or question the group’s decisions are pressured to conform.

Social Psychology

Groupthink has played a significant role in various instances of flawed decision-making throughout history. In their research, social psychologists have identified several factors that contribute to the emergence of groupthink, such as group cohesiveness, group isolation, and external threats. The role of leadership is particularly crucial in fostering or preventing groupthink. Effective leaders can encourage open communication, promote critical thinking, and create a culture that values diverse perspectives.

In order to better understand the concept of groupthink, researchers have conducted various empirical studies and developed strategies to prevent its occurrence. These strategies include:

  • Encouraging group members to voice their opinions and concerns, even if they differ from the majority stance.
  • Assigning a “devil’s advocate” role to provoke critical questioning and alternative solutions.
  • Inviting external perspectives to provide additional insights and unbiased opinions.

Recognizing and addressing the risks and potential pitfalls of groupthink can significantly improve the quality of group decision-making and lead to more effective outcomes.

Causes and Symptoms of Groupthink

High Degree of Cohesiveness

A high degree of cohesiveness within a group can lead to groupthink, as group members may prioritize maintaining harmony and unity over critical evaluations of alternative ideas. This cohesiveness can result in symptoms of groupthink, such as overconfidence, illusion of invulnerability, and reduced mental efficiency in decision-making processes, as members may avoid challenging the group’s consensus.

Censorship and Self-Censorship

Censorship and self-censorship are common symptoms of groupthink. Group members often withhold their dissenting opinions, minimizing disagreements and avoiding conflicts. Similarly, in an effort to maintain group unity, they may self-censor their ideas, suppressing their own doubts and concerns. This self-censorship can prevent reality testing, reducing the group’s ability to evaluate the risks and consequences of their decisions accurately.

Illusions of Invulnerability and Unanimity

Groupthink often generates an illusion of invulnerability, leading to overconfidence, wherein the group members believe their decisions are infallible, and consequently, they take greater risks. This behavior can be detrimental to the group’s overall success or effectiveness. Similarly, illusions of unanimity can occur when members wrongly assume that everyone in the group is in agreement, further suppressing dissenting opinions.

Direct Pressure to Conform

Within a group impacted by groupthink, there may be direct pressure on individuals to conform to the group’s consensus. This pressure can come from the group’s leader or other influential members, as they actively discourage dissenting opinions or alternative viewpoints. This direct pressure forces individuals to conform, further exacerbating the symptoms of groupthink and reducing the group’s ability to make well-informed decisions.

Historical Examples of Groupthink

Bay of Pigs Invasion

The Bay of Pigs Invasion is a notorious example of groupthink, in which the US government attempted to overthrow the Cuban government in 1961. The operation was badly planned and poorly executed, leading to the capture of around 1,200 CIA-backed Cuban exiles. One of the main causes of the failure was groupthink, as decision-makers failed to consider alternative plans or assess the risks adequately1.

Vietnam War

The Vietnam War was a long and protracted conflict, with the US heavily involved from the early 1960s to the mid-1970s. Groupthink played a significant role in the failure of US policies and strategies, as top military and political leaders consistently failed to question the efficacy of their assumptions and actions, like their belief in the domino theory2. Instead, a culture of conformity was created, leading to ineffective decision-making and devastating consequences.

Pearl Harbor

The surprise attack on Pearl Harbor by the Japanese in 1941 led to the US entry into World War II. Despite numerous warning signs and intelligence reports, US military officials failed to act, attributing to a groupthink mentality that influenced their disregard for the impending threat3. Complacency and overconfidence are key factors in the groupthink phenomenon that impacted the judgement of military leaders leading up to the attack.

Watergate Scandal

The Watergate Scandal (1972-1974) was a political scandal in the US involving a break-in at the Democratic National Committee headquarters and the subsequent cover-up by the Nixon administration. Groupthink was a crucial factor in Nixon’s inner circle, as loyalty to the president and a culture of conformity led to a series of unethical actions culminating in the downfall of the administration4.

Challenger Space Shuttle Disaster

The Challenger Space Shuttle Disaster in 1986 saw the tragic loss of seven astronauts when the shuttle exploded shortly after launch. A key factor in this tragedy was groupthink, as NASA officials ignored clear warnings of flaws in the shuttle’s O-ring system. The eagerness to maintain a positive image and the fear of negative consequences influenced the decision-making process, leading to the disastrous outcome5.

2003 Invasion of Iraq

The 2003 Invasion of Iraq was a controversial military action led by the US and allied forces, aimed at overthrowing the government of Saddam Hussein. Groupthink played a role in the decision-making process, as intelligence concerning weapons of mass destruction was not adequately scrutinized, and alternative viewpoints were not seriously considered. This lack of critical analysis created a tunnel vision effect and led to a deeply flawed decision to invade6.

Consequences and Impact of Groupthink

Inefficient Problem-Solving

Groupthink can lead to inefficient problem-solving as members of the group may not fully analyze all available options and alternatives. This can be attributed to the pressure for uniformity and agreement within the group, which encourages members to avoid voicing their concerns or alternative perspectives. As a result, some important factors may be overlooked, leading to poor decision-making and potentially negative outcomes1.

Rationalization and Overconfidence

In groups experiencing groupthink, members may become overconfident in their decisions, leading to rationalization. This occurs when group members justify their decisions without adequately considering the potential risks and consequences2. Moreover, the group’s belief in its invulnerability can further contribute to this overconfidence, causing members to view their decisions as infallible and making them less likely to identify potential problems3.

Suppressed Creativity and Critical Thinking

Groupthink can lead to suppressed creativity and critical thinking within the group4. As mentioned earlier, the pressure for uniformity can cause members to avoid expressing alternative views, even when they might be crucial for problem-solving. This stifling environment can inhibit the generation of innovative ideas and limit the group’s ability to think critically. In turn, this can result in a lack of diverse perspectives and potential solutions being overlooked.

Negative Effects on Decision-Making

The various consequences of groupthink discussed above can come together to negatively impact the decision-making process. From inadequate problem-solving to overconfidence and the suppression of creativity, a group experiencing groupthink is less likely to explore all possible options and fully understand the associated risks5. This can lead to decisions that may not be in the best interests of the group or its stakeholders, ultimately decreasing the efficiency and effectiveness of the decision-making process.

Preventing and Managing Groupthink

Promoting Diverse Perspectives

One effective method for preventing groupthink is to promote diverse perspectives within the group. By including members with diverse backgrounds, a broader range of ideas and viewpoints can be brought to the discussion, reducing the likelihood of groupthink. To further enhance diversity, consider:

  • Recruiting team members with different experiences, expertise, and cultures.
  • Encouraging cross-functional collaboration between various departments.

Encouraging Open Debate

Providing an environment where people can express their opinions freely is crucial in avoiding groupthink. Encourage open debate by:

  • Ensuring that everyone has an equal opportunity to speak and share their ideas.
  • Promoting a culture of respectful disagreement where dissent is welcomed, not punished.
  • Reminding team members that it’s okay to challenge assumptions and question the status quo.

Imposing Time Constraints and Impartial Leadership

Another way to manage groupthink is by imposing time constraints on decision-making and assigning an impartial leader who can:

  • Create a sense of urgency, preventing members from getting too comfortable with the initial consensus.
  • Encourage the exploration of alternatives and weighing of pros and cons without bias.
  • Steer the group away from doublethink and any tendencies to rationalize poor decisions.

Using Devil’s Advocate

Implementing the devil’s advocate technique can help prevent groupthink by:

  • Appointing a person or a team to actively challenge the majority opinion and present counterarguments.
  • Rotating the devil’s advocate role periodically, so everyone experiences questioning the group’s decisions.
  • Creating a constructive atmosphere where the devil’s advocate’s role is seen as beneficial rather than confrontational.

By promoting diverse perspectives, encouraging open debate, using impartial leadership, and implementing techniques such as the devil’s advocate, groupthink can be effectively managed and prevented.

Groupthink in Different Contexts

Science and Technology

Groupthink can be a detrimental factor in science and technology, as it may lead to conforming to a dominant idea and suppressing alternative theories. This can inhibit scientific progress, as researchers might overlook flaws in the widely accepted hypotheses. For instance, if members of a research team at Yale University develop a consensus on a specific theory, they may unconsciously ignore contrary evidence due to the group’s reinforcement of this shared belief.

Medical and Moral Judgment

The presence of groupthink can also affect decisions in medical and moral judgments. Medical professionals relying on group consensus without considering alternative courses of action may lead to ineffective treatments or misdiagnosis. Additionally, groupthink can influence moral judgment within medical institutions, causing professionals to follow questionable practices if that is what the majority decides. This could potentially lead to ethical dilemmas and adverse outcomes for patients.

Community and Social Systems

Within community and social systems, groupthink can have both positive and negative impacts. On one hand, shared values and beliefs can strengthen social cohesion, create a sense of belonging, and promote group identity among community members. On the other hand, it can foster a rigid conformity that stifles individual creativity, leading to the marginalization of those who hold different opinions.

Organizations and Management

In organizations and management, groupthink can affect decision-making processes, particularly if managers and employees are unable or unwilling to challenge the predominant opinions in their workplace. This may result in inefficient procedures, the adoption of suboptimal strategies, or ignoring valuable input from employees with dissenting views. To counter groupthink, organizations can emphasize open communication, encourage diverse perspectives, and foster an environment where questioning conventional wisdom is accepted and valued.

Frequently Asked Questions

What causes groupthink?

Groupthink occurs when a group prioritizes consensus over critical reasoning and evaluation. Factors that contribute to groupthink include high group cohesion, insulation from outside opinions, and strong pressure to conform. A lack of diverse perspectives and strong leadership that discourages dissent can also lead to groupthink (source).

What are the symptoms of groupthink?

Symptoms of groupthink include an illusion of invulnerability, self-censorship by group members, pressure to conform, and an illusion of unanimity. The group may also engage in stereotyping outsiders and rationalizing its decisions without considering alternative viewpoints (source).

What is an example of groupthink?

One example of groupthink is the Bay of Pigs invasion in 1961. The U.S. government, under President John F. Kennedy, believed that invading Cuba and overthrowing Fidel Castro was a strategic move. Many within the administration had doubts but did not voice them due to the pressure to maintain consensus, ultimately leading to a disastrous operation (source).

What is the difference between groupthink and group polarization?

While groupthink is characterized by a lack of critical evaluation and conformity within a group, group polarization refers to the phenomenon where group discussions cause members to adopt more extreme positions than they initially held. Both groupthink and group polarization can lead to flawed decision-making, but the processes and mechanisms are different (source).

Why is groupthink considered a problem?

Groupthink is considered a problem because it interferes with effective decision-making processes. When critical thinking and alternative viewpoints are suppressed, a group might overlook potential risks, fail to consider crucial information, or make decisions based on incomplete or faulty data (source).

How does groupthink impact decision-making?

Groupthink impacts decision-making by inhibiting critical thinking, discouraging dissenting opinions, and fostering a false sense of consensus. This can result in inefficient problem-solving, poor risk assessment, and misguided choices that can have significant consequences for organizations and individuals alike (source).


  1. Assessing political group dynamics: a test of the groupthink model. 2
  2. A review of research on groupthink. 2
  3. Pearl Harbor and groupthink. 2
  4. Group behaviors and psychological influences: The Watergate case 2
  5. Groupthink and the space shuttle Challenger accident: Toward a quantitative case analysis. 2
  6. The nature of social influence in groupthink: Compliance and internalization.