Groupthink
A cohesive group's drive for agreement overrides realistic appraisal of alternatives. Janis listed symptoms including an illusion of invulnerability, collective rationalisation, stereotyping of outsiders, self-censorship, an illusion of unanimity and self-appointed 'mindguards'.
What drives it
It protects the group's sense of competence and harmony and keeps members' status safe. For identification, its value is less as a validated theory and more as a checklist of warning signs for a team that has stopped testing its own assumptions.
How it shows
Work
Board or leadership team that has been together a long time, with a dominant chair who states a preference early. Dissent is reframed as 'not being a team player'. Bad news from outside is dismissed as coming from people who 'don't get it'. A deputy quietly keeps contrary data off the agenda (the mindguard). Decisions are taken quickly with no recorded alternatives and no pre-mortem. Who resists: often the outsider, the newest non-executive or the person with nothing to lose; they tend to be frozen out rather than argued with.
Relationships
A family that has agreed the business is fine, or that a relative's drinking is 'just how he is', and treats any member who questions it as disloyal. Communities and congregations that react to outside criticism by closing ranks.
Self
You feel the warmth of a team that agrees and notice a reluctance to be the one who breaks it. You keep a doubt to yourself because 'everyone else seems sure' and later find several people had the same doubt.
What tells it apart
Conformity: Conformity can happen in any crowd of strangers; groupthink needs a cohesive in-group making a decision, and shows in the decision process: few alternatives considered, outsiders stereotyped, dissent policed.
Basic assumption groups (Bion): Bion's basic assumptions describe unconscious group moods (dependency, fight-flight, pairing) that may not involve any decision; groupthink is specifically a decision-making failure visible in what options were and weren't examined.
Pluralistic ignorance: Pluralistic ignorance is a perception error any group can make; groupthink adds active pressure: mindguards, framing of dissenters as disloyal, collective rationalisation.
A test
Ask the team to list the alternatives they rejected and who argued for them; a thin or empty list, plus no one able to name a dissenting voice, points to concurrence-seeking.
Questions to carry
- Which alternatives did the team reject, who argued for them, and what happened to those people?
- In which group do I keep my doubts to myself, and what do I fear would happen if I spoke?
How strong the research is
mixed. Janis built the model from historical case studies (Bay of Pigs, Pearl Harbor); controlled tests of the full model give limited support, cohesion in particular does not reliably predict bad decisions, though component processes such as shared-information bias and self-censorship are well documented.
Where it comes from
Irving Janis, 1972 (Victims of Groupthink), revised 1982; the term was coined by William H. Whyte, 1952
Sources
- Irving L. Janis, Victims of Groupthink (1972)