Why Smart Teams Make Bad Decisions
Group dynamics that override individual intelligence
Put six brilliant people in a room and you can still get a worse decision than any one of them would have made alone. These are the patterns that do it.
- 01Mental Models · Social
Groupthink
Consensus pressure as a defect, not a virtue.
Desire for conformity leads to irrational or dysfunctional decisions.
Open the full definition →Try it · 30 secondsLive example · Apply GroupthinkUse the model. Pick the move.
Desire for conformity leads to irrational or dysfunctional decisions. You've just seen this: A team launches a flawed product because dissent felt disloyal. Which lever does the model recommend?
● LivePick a lever. There are no neutral ones — every incentive funds a behavior somewhere.
- 02Mental Models · Social
Abilene Paradox
Everyone agrees to the decision nobody wanted.
A group decides on a course of action that nobody actually wants, because everyone assumes others prefer it.
Open the full definition →Try it · 30 secondsLive example · Apply Abilene ParadoxUse the model. Pick the move.
A group decides on a course of action that nobody actually wants, because everyone assumes others prefer it. You've just seen this: A team agrees to a painful relocation because each person thinks the others want it. Which lever does the model recommend?
● LivePick a lever. There are no neutral ones — every incentive funds a behavior somewhere.
- 03Bias · Social
Bystander Effect
Diffused responsibility, missed disasters.
Diffused responsibility means nothing happens.
Open the full definition →Try it · 30 secondsLive · Catch bystander effectA critical bug is filed in a 200-person Slack channel. By end of day:
- 04Bias · Social
Bikeshedding (Parkinson's Law of Triviality)
Why the easiest agenda item eats the meeting.
Spending disproportionate energy on trivial decisions.
Open the full definition →Try it · 30 secondsLive · Pick the metricA 90-minute leadership meeting. Three agenda items.
Which gets the most airtime?
- 05Bias · Decision
Sunk Cost Fallacy
Why teams keep funding the obviously dead.
Throwing more in because we already threw a lot in.
Open the full definition →Try it · 30 secondsLive · Catch sunk cost fallacyYou bought a $200 concert ticket. Day of, you have the flu. Honestly:
- 06Bias · Belief
Confirmation Bias
The collective version is the most dangerous one.
We hunt for evidence that we were right all along.
Open the full definition →Try it · 30 secondsLive · Catch confirmation biasI show you the sequence 2-4-6 and ask you to find the rule. You may test more sequences. Which do you try first?
Notice the through-line: nobody is malicious. Everyone is rational. The room is the problem.
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