How Groupthink Can Affect Decision-Making at Work

Authored by: Peter Cheel

Teams make most workplace decisions today in organisations around the world. People who work together effectively achieve their goals more quickly while generating superior creative solutions. But something strange happens sometimes that undermines all of that collaborative effort.

The same teamwork which enables groups to achieve success creates decision-making problems which groups don’t think of. Groups begin to prioritise agreement over honest dialogue, which results in employees avoiding the exchange of contrasting opinions with their colleagues. Teams select options which appear absurd during future team reviews of their decisions.

What Is Groupthink?

Definition + Theory

The psychological phenomenon of groupthink causes people to prioritise team unity and agreement above all else while they abandon their critical thinking abilities. This can lead to substandard choices because teams don’t fully explore different options and become less able to detect potential threats.

This phenomenon can occur even in highly capable, intelligent, and experienced teams. Members may sense that something is wrong but avoid challenging the group in order to preserve harmony. As a result, teams value cohesion over thorough evaluation, leading to flawed decision-making despite genuine commitment and passion for the work.

Origins of the Concept

Social psychologist Irving Janis came up with this term after studying how smart groups make terrible decisions. His research helped people understand why teams fail in ways that seem obvious afterwards.

Janis identified specific warning signs that show when groups are heading towards poor choices together. His work still guides how organisations think about team decisions decades later in modern workplaces.

How Groupthink Shows Up at Work

Spotting groupthink isn’t always easy because it looks like normal teamwork at first glance. Teams often don’t realise they’ve fallen into this trap until much later when problems surface.

Here’s what typically happens:

• Teams gloss over risks to maintain harmony and avoid uncomfortable discussions: During a weekly meeting filled with excitement about an upcoming launch, a team member notices serious timeline issues but stays silent to avoid dampening the positive mood. The organisation accepts a risky schedule without identifying potential problems.
  
• Members hesitate to share unpopular ideas that might disrupt the group’s preferred direction: Junior staff spot flaws and alternative solutions that are missing from senior leaders’ reports, but assume management has already considered everything. They withhold concerns and the group never explores better options.
  
• Dominant voices steer decisions without challenge, and everyone else just goes along with them: Strong personalities state their opinions early in meetings, shaping the discussion’s direction. Others fall in line and suppress questions and concerns to preserve good working relationships with colleagues and superiors.
  

Eye-Opening Research & Trends

Academic work shows that groupthink can lead to biased information processing and weak critical analysis. It also results in insufficient consideration of alternative viewpoints, which negatively impacts organisational decision processes.

Groups seek out information that confirms what they already believe about a situation or solution. They ignore or dismiss evidence that contradicts their preferred direction without proper consideration. The filtering happens automatically without anyone noticing it in real time during discussions.

Industry Context

Organisations today understand this issue as a common problem which they actively work to prevent. Some studies (including Deloitte discussions on team and leadership design) point to organisations adjusting how teams work and how leaders run decision-making, because they understand the damage it can cause to results and culture over time.

The Hidden Risks of Groupthink at Work

Groupthink creates problems that go far beyond one bad decision. The effects ripple through teams and damage how organisations function over time.

Key risk areas

• Creativity: Novel ideas get filtered out, and teams miss innovative solutions that could help
  
• Risk assessment: Hidden issues stay buried, and assumptions go untested
  
• Team engagement: Quiet members withdraw from participation, and talent leaves the organisation eventually
  

Suppressed Creativity

Team performance deteriorates when members stop expressing opposing views because this practice results in the disappearance of multiple perspectives which generate innovative solutions. The most innovative concepts emerge from unconventional viewpoints which unite different concepts that normally would not be connected.

People conceal their actual thoughts because they fear others will view them as foolish after they express their genuine beliefs. The team faces a shutdown of new ideas at the exact moment when they require them.

Poor Risk Assessment

The need for complete agreement prevents teams from discovering hidden problems because team members avoid asking questions which might generate opposing viewpoints. People in groups develop an incorrect sense of security about their decisions because they think their collective agreement holds value.

Questions about what could go wrong never get adequate attention. The evaluation process fails to test assumptions properly because it disregards outside factors which could affect upcoming decisions. Decisions which appear strong during conference room discussions become unstable when they encounter real-world challenges.

Reduced Engagement

Quiet or minority team members disengage when they feel their opinions aren’t valued. They stop contributing meaningfully to discussions over time and simply go through the motions.

This creates several problems:

• The team loses valuable input that could have improved decisions
  
• Morale takes a hit, and people feel less connected to outcomes
  
• Talented people eventually leave the organisation to find environments where they’re heard
  
• Fresh perspectives disappear just when teams need them most for innovation and problem-solving
  

When Groupthink Has Been Costly

Perhaps no examples show the catastrophic potential of groupthink better than two NASA tragedies. The Challenger and Columbia disasters both involved engineers raising concerns about critical issues.

Before Challenger’s launch, warnings about O-ring vulnerability in cold temperatures were raised by technical staff. Before Columbia’s re-entry, engineers flagged concerns about foam strike damage to the shuttle’s exterior.

Decision-makers needed to maintain schedules, so warning signs were not taken seriously enough. Teams developed a false sense of safety and dismissed alternatives before making choices that led to disaster.

These cases are extreme, but the pattern is familiar. Similar dynamics show up in business when teams prioritise harmony over scrutiny. The result can be failed launches, missed market opportunities, wrong strategic decisions, and compromised safety standards.

Strategies to Reduce Groupthink at Work

The good news is that groupthink isn’t inevitable and can be prevented. Organisations can take concrete steps to protect against it and improve decision quality.

1) Encourage Diverse Voices

Organise teams with different backgrounds because this approach will bring in multiple viewpoints. Diversity needs to go beyond tokens. The process needs genuine inclusion and cognitive diversity because it leads to better decision quality.

2) Appoint a Devil’s Advocate

Switch the role between meetings so teams regularly test assumptions. When someone has a clear mandate to question proposals, others tend to share worries more openly.

3) Structure Meetings Thoughtfully

Have people work independently before group discussion begins. Ask team members to write down their analysis or concerns first. This reduces conformity pressure and prevents early speakers from dominating the discussion.

4) Prioritise Psychological Safety

Create an environment which accepts different perspectives instead of punishing them. Staff members should be able to express their opinions without fear. Leaders should actively invite opposing perspectives and publicly thank people who raise concerns so others see the value.

All other strategies fail when psychological safety is absent.

5) Use Anonymous Feedback Tools

Gather private input so members can share authentic thoughts they wouldn’t share in a meeting. Anonymous surveys or written submissions help when authority, hierarchy, or group pressure prevents direct disagreement.

6) Review Decisions Retrospectively

After projects conclude, conduct post-mortems that examine the decision-making process, not just outcomes.

Ask:

• Were dissenting voices heard and given time?
  
• Were alternatives explored, or did the team settle on the first option?
  
• Did anyone have concerns that never got voiced?
  

This builds organisational learning and helps teams recognise warning signs earlier next time.

Finally, Better Decisions Start with Better Processes

Groupthink poses a significant threat to organisational decision-making, even in high-performing teams. While teamwork and cohesion are valuable, they can stifle critical thinking and innovation.

Organisations must actively implement strategies like encouraging diverse perspectives, appointing devil’s advocates, and fostering psychological safety. By recognising the warning signs and establishing structured processes, teams can protect themselves from conformity bias.

Better decisions require more than intelligence. They demand deliberate systems that challenge assumptions, welcome dissent, and prioritise thorough analysis over harmony.

Autor Bio : 

Peter Cheel is a business coach based in Sydney, Australia, helping business owners gain clarity and direction. With strong experience working alongside small and medium-sized companies, he focuses on practical strategies that deliver measurable results. Peter is known for his straightforward approach, supporting leaders to improve performance, strengthen teams, and build sustainable growth.

Website: https://www.businesscoachsydney.com/