Watch for
Meetings with fast unanimous agreement and little dissent.
Social & PerceptionBias #44
Groupthink
The desire for harmony can override critical thinking.
A psychological phenomenon where the desire for group consensus and harmony overrides realistic appraisal of alternatives leading to poor decisions.
Why it matters: Used to explain the Bay of Pigs invasion Pearl Harbor and the Challenger explosion.
Try this
Appoint a designated devils advocate and encourage anonymous input.
Real-world example
A board unanimously approves a flawed strategy because nobody wants to raise objections.
Key researchers
Irving Janis
First described in 1972
Psychological mechanism
Social cohesion combined with the illusion of unanimity. Dissent is suppressed because it threatens belonging.
Seminal research
Irving L. Janis (1972), "Victims of Groupthink."
Below is a realistic scenario. Read it, then choose what you would do. The feedback will show whether a cognitive bias influenced your choice — not to judge, but to reveal the pattern in action.
Thought Experiment
This experiment places you in a realistic decision. Your instinctive choice will reveal whether bias is at work.
STEP 1 → ReadSTEP 2 → ChooseSTEP 3 → Reveal
Debrief
Biases are not character flaws. They are recurring patterns in how minds compress uncertainty, save energy, and narrate reality. Once you recognise the pattern, you can slow the decision down, test the assumption, and make space for a better explanation.
Sources
EducationalAPA Dictionary entry