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Picture a meeting. Someone puts a plan on the table. You have a doubt about it. A real one.
You look around. Everyone is nodding. So you nod too.
Here is what you can’t see. Two other people in the room have the same doubt. They looked around, saw you nodding, and kept quiet.
If you have ever asked what is groupthink, that moment is the heart of it. A whole room can agree to a plan that hardly anyone in the room fully believes in.
The idea is famous. It is also a little different from what most quick answers say. And there is one small thing that has been shown to weaken it.
What Is Groupthink? The Short Answer
Groupthink is what happens when a group wants to agree so much that it stops testing its own ideas. People hide their doubts, silence gets counted as a yes, and the group walks into a bad decision that some of its own members could have warned against.
The man who made the idea famous was Irving Janis, a psychologist at Yale University. He put it in more careful words. Groupthink, he wrote, is the way people think “when concurrence-seeking becomes so dominant in a cohesive ingroup that it tends to override realistic appraisal of alternative courses of action.”
In plain words: getting along became more important than getting it right.
Groupthink is not the same as agreeing. Groups agree all the time, and often they are right. Groupthink is agreement that nobody checked. No one asked the hard question, so no one knows if the plan could survive one.
It can happen anywhere people decide things together. A team at work. A family choosing what to do about a sick parent. A committee. Friends planning a small business. A group chat where one opinion has already won.
Where the Word Groupthink Came From
Many quick answers say Irving Janis invented the word in 1972. That is not quite right.
The word showed up twenty years earlier. In March 1952 a writer named William H. Whyte used it as the title of an article in Fortune magazine. Whyte was worried about life inside big companies. He called groupthink “a rationalized conformity,” a way of thinking which holds that the group’s values are “not only expedient but right and good as well.”
So for Whyte, groupthink was not a slip. It was something people were proud of. Going along had become a virtue. A paper in the journal Human Relations has traced how Whyte was slowly dropped from the textbooks, until the word seemed to belong to Janis alone.
Janis picked the word up in a magazine article in November 1971, and then in his 1972 book, Victims of Groupthink. He gave it the meaning we use today. He was trying to answer one question. How does a room full of clever, well-informed people make a terrible decision?
A Groupthink Example: The Bay of Pigs
The best-known case Janis studied is from April 1961.
John F. Kennedy had been president of the United States for less than three months. His advisers backed a secret plan. About 1,400 Cuban exiles would land on a beach in Cuba, at a place called the Bay of Pigs, and bring down the government of Fidel Castro.
The plan failed almost at once. Within three days the force was beaten. More than a hundred of the men were dead, and most of the rest were prisoners.
The people around Kennedy were not fools. Some of them had doubts. That is what interested Janis. Where did the doubts go?
One adviser, the historian Arthur Schlesinger Jr., later wrote about it with painful honesty in his book A Thousand Days:
“In the months after the Bay of Pigs I bitterly reproached myself for having kept so silent during those crucial discussions in the Cabinet Room.”
He had managed, in his own words, only “a few timid questions.” His urge to object, he wrote, “was simply undone by the circumstances of the discussion.”
Read that line again. Nobody ordered him to be quiet. The room did it.
There was a push as well. Schlesinger recorded that the president’s brother, Robert Kennedy, took him aside and said: “You may be right or you may be wrong, but the President has made his mind up.”
Janis had a name for a person who does that. He called them a mindguard. A bodyguard keeps a leader safe from harm. A mindguard keeps a leader safe from hearing things the leader does not want to hear.
The 8 Symptoms of Groupthink
Janis listed eight warning signs. Here they are in plain words.
- Feeling unbeatable. The group is so sure of itself that it takes big risks.
- “We are the good ones.” The group is so sure it is in the right that it stops asking if the plan is fair.
- Explaining away warnings. Bad news gets a quick excuse, not a second look.
- Looking down on outsiders. People who stand against the plan are written off as weak, foolish or bad.
- Keeping quiet. Members hide their own doubts so they do not spoil the mood.
- Silence counted as yes. Nobody objects, so everybody assumes everybody agrees.
- Leaning on the doubter. Anyone who does speak up is made to feel disloyal.
- Mindguards. Some members take it on themselves to keep unwelcome facts away from the group and its leader.
A group does not need all eight to be in trouble. Numbers five and six are the quiet ones, and they feed each other. Every silent person makes the next person more likely to stay silent.
Number three has a relative you may know. It is the group version of confirmation bias, the habit of noticing what agrees with you and sliding past what does not.
What the Research on Groupthink Really Shows
Here is the part most explanations leave out. Groupthink is one of the best-known ideas in psychology, and the proof for it is thinner than its fame.
Janis built his theory by reading the history of a small number of famous decisions after they had gone wrong. That is a fair way to find an idea. It is a weak way to prove one. When you already know the ending, warning signs are easy to spot.
So other researchers tried to test it. In 1990 a review by Won-Woo Park counted only 16 published studies, and found they gave the theory only partial support. Janis had said the main cause was a close, tight-knit group. Park reported that no study so far had shown closeness on its own doing that. In 1993 Ramon Aldag and Sally Fuller argued the whole idea had been stretched too far from too few cases.
Does that make groupthink a myth? No. The warning signs are real, and you have probably seen them yourself. What changed is where researchers think they come from.
In 2005 the psychologist Robert Baron went back over the evidence. He argued that the symptoms are not rare, and not saved for powerful, close-knit teams. They turn up in ordinary groups all the time.
That is less comforting than the famous version, and more useful. You do not need a president and a war. A family, a school committee or four friends with a business idea will do. The risk is not that your group is special. The risk is that your group is normal.
What One Honest Voice Does to a Group
Some of the clearest evidence comes from a different experiment, about plain lines on a card.
In the 1950s the psychologist Solomon Asch sat people around a table and showed them lines. The job was simple: say which of three lines was the same length as a fourth. On their own, people got it wrong less than 1 percent of the time.
Then Asch filled the table with helpers who had secretly been told to give the same wrong answer, out loud, one after another. Only one person at the table was really being tested, and that person heard the others first.
Faced with a whole table agreeing on a wrong answer, the real subjects went along with it 36.8 percent of the time. These were not hard questions. They could see the right answer with their own eyes.
Then Asch changed one thing. He had one helper tell the truth.
With just one other person giving the right answer, Asch reported, people answered wrongly “only one fourth as often.”
One voice. Not a majority. Not a clever speech. Just one person saying what they saw.
And it was fragile. When Asch had that truthful partner switch over to the majority halfway through, the mistakes shot back up.
A fair warning: this was a test about lines, in a room where nothing was at stake. A real decision, with a real boss and real friendships, is harder. But the lesson has held its place for seventy years. A group’s pull is strongest when it is total. Break the “everyone,” and it weakens.
How to Avoid Groupthink
After the Bay of Pigs, Kennedy changed the way his team worked. Eighteen months later came the Cuban Missile Crisis, with far more at stake. Janis studied that decision too, as an example of a group getting it right.
Outside experts were brought in and questioned. The team was split into smaller groups that worked apart. And Kennedy stayed away from some meetings on purpose, so that nobody could simply follow his lead.
None of that costs money. Here is the same thinking for everyday life.
- If you lead, speak last. Once the boss, the parent or the eldest has said what they want, most people stop thinking and start agreeing. Ask first. Share your view after. If you are not sure how you come across when you are in charge, our free What Is My Leadership Style? quiz is a quick way to look.
- Collect doubts before the talking starts. Ask everyone to write down what they think before anyone speaks. Scraps of paper will do. Then read them all out.
- Give someone the job of disagreeing. Janis suggested a devil’s advocate: one person whose task is to look for holes in the plan, with a different person taking the job each time. It turns doubt from rudeness into a duty.
- Ask someone outside the group. Pick a person who does not need the group to like them.
- Treat a fast, total yes as a yellow light. When a big decision gets no pushback at all, slow down and ask, “What would have to happen for this to go wrong?”
Talking a plan through with someone who sees it differently does more than thinking harder on your own. There is good evidence for that, and you can read about it in our piece on why arguing it out beats thinking alone.
And if you are the one with the doubt, try saying it as a question. “Can I check one thing before we decide?” You do not have to be certain to speak. You may be the voice two other people were waiting for.
The King With 400 Advisers Who All Said Yes
Long before anyone had a word for groupthink, somebody wrote it down as a story. It comes from the Hebrew Bible, and the events it describes are set nearly three thousand years ago.
A king of ancient Israel wants to go to war to win back a border town. A neighbouring king is visiting. He agrees to join the fight, but he asks for one thing first. Let us get some advice.
So the first king gathers his advisers. They are prophets, men whose job is to say what God wants. There are about four hundred of them. He asks: shall I go, or not?
All four hundred say go. You will win. One of them has even made a pair of iron horns, as a prop, to show how the king will push his enemies over.
Four hundred to none. And here is the first surprise. The visiting king is not comforted. He asks: is there not someone else we could ask?
The answer is one of the most honest lines in any old book. Yes, says the first king, there is one more man. But I hate him, because he never says anything good about me.
So the missing voice was not missing by accident. The king knew exactly who would disagree. He had left that man out before the meeting began.
They send for him anyway. His name is Micaiah. On the road, the messenger gives him some friendly advice. All the others have spoken well of the plan, with one voice. Let your word be like theirs.
Put that next to what Schlesinger was told in 1961. It is nearly the same sentence, roughly 2,800 years apart. Janis would have called that messenger a mindguard.
Micaiah arrives. The king asks his question. And Micaiah gives the same answer as everyone else. Go. You will win.
The king snaps at him. How many times must I make you swear to tell me nothing but the truth?
That is the detail that is hard to shake. The king could tell. He knew a hollow yes when he heard one. He had four hundred of them standing behind him, and some part of him knew what they were worth.
So Micaiah tells him what he really sees: an army scattered over the hills, like sheep with no shepherd.
The king turns to his guest. Did I not tell you? One of the four hundred walks over and hits Micaiah in the face. The king orders him locked up on bread and water until the king comes home safe.
Then the king goes to war. But he goes in disguise. A man who trusts four hundred yeses does not need a disguise. An arrow, shot at random, finds a gap in his armour. He is dead by evening.
The story makes a simple claim. In that crowded room, God’s word was not with the four hundred. It was with the one man who had been left off the list. Truth is not a headcount.
Whatever you make of the faith behind it, the story knows people very well. Hold it next to Janis’s list of eight and see how many you can find.
It is honest about one more thing. The visiting king asked exactly the right question. He heard the answer. And he rode into the battle anyway, and came close to dying there. Asking for the other voice is only half of it. The other half is letting the answer change what you do.
A good place to start: it is easier to be the one honest voice when you are not living on the room’s approval. We made a short free guide called The Beginner’s Guide to Feeling God’s Presence Every Day. It is a simple video and companion PDF for noticing God in ordinary moments, even when life feels chaotic. Get the free guide. Free.
The Next Time Everyone Agrees
Agreement is not the enemy. Most days, when everyone agrees the shop shuts at six, the shop shuts at six.
But the next time a big decision gets a fast, smooth, total yes, try the visiting king’s question. Is there anyone we have not heard from?
It may be the quiet person at the end of the table. It may be the newest one. It may be the person who always sees problems, and whom everyone finds a little tiring. It may be a doubt of your own that you have been sitting on.
Asch’s lines suggest you do not have to win the room. You only have to say what you see. That makes it easier for the next person to say what they see too.
A room where someone can say “I am not sure about this,” and still be welcome tomorrow, is worth more than four hundred yeses.
Discussion Question
Which do you think is harder: being the one person who disagrees, or being the leader who has to listen to them? Tell us what you think in the comments.
Share This
In a famous 1950s test, people went along with an obviously wrong answer 36.8% of the time. When just one other person told the truth, they went along only a quarter as often. One voice matters. https://bgodinspired.com/index.php/personal-growth-and-life-skills/what-is-groupthink/
I always thought groupthink only happened in governments and boardrooms. Turns out the research says it shows up in ordinary groups all the time. Families included. https://bgodinspired.com/index.php/personal-growth-and-life-skills/what-is-groupthink/
New rule for big decisions: if everyone says yes fast, ask “is there anyone we have not heard from?” A good read on what groupthink really is. https://bgodinspired.com/index.php/personal-growth-and-life-skills/what-is-groupthink/
What Is Groupthink? Common Questions Answered
What is groupthink in simple terms?
Groupthink is what happens when a group of people wants to agree so much that it stops testing its own ideas. Members hide their doubts, silence is treated as agreement, and the group can end up making a poor decision that some of its own members privately doubted. Groupthink is different from ordinary agreement because the agreement has not been checked.
Who coined the term groupthink?
The word groupthink was first used by the writer William H. Whyte in an article in Fortune magazine in March 1952, where he described it as a rationalized conformity. The psychologist Irving Janis of Yale University gave groupthink its modern meaning in a November 1971 magazine article and in his 1972 book Victims of Groupthink, which studied how groups of capable advisers made poor decisions.
What are the 8 symptoms of groupthink?
Irving Janis listed eight symptoms of groupthink: an illusion of invulnerability, an unquestioned belief in the group’s own morality, explaining away warnings, stereotyping outsiders and opponents, self-censorship of doubts, an illusion of unanimity in which silence is taken as agreement, direct pressure on anyone who dissents, and self-appointed mindguards who keep unwelcome information away from the group and its leader.
What is a famous example of groupthink?
The best-known example of groupthink is the Bay of Pigs invasion of April 1961. Advisers to United States President John F. Kennedy backed a plan to land about 1,400 Cuban exiles in Cuba, and the force was defeated within three days. Irving Janis used the case to show how advisers with private doubts stayed silent. One adviser, Arthur Schlesinger Jr., later wrote that he bitterly reproached himself for having kept so silent.
How can a group avoid groupthink?
A group can reduce groupthink by having the leader share an opinion last, asking every member to write down a view before discussion begins, giving one person the job of devil’s advocate, asking for the opinion of someone outside the group, and slowing down when a big decision gets fast and total agreement. Solomon Asch’s conformity experiments in the 1950s found that when just one other person gave the correct answer, people went along with a wrong majority only one fourth as often.
