False Consensus Effect
Updated 2026-08-06
INTRODUCTION
English translation pending.
CORE DEFINITION
Described by Lee Ross and colleagues in the 1970s, the false consensus effect is the tendency to see one's own choices, beliefs and habits as more common and more normative than they actually are. It arises from the availability of one's own position and from the company one keeps, since similar people are more likely to be encountered. The effect distorts market research, product decisions and moral judgments about what most people would do.
SCAFFOLDING EFFECT
Reduce cognitive load
- Sample outside: gather opinions from people unlike yourself rather than from your usual circle. - Replace intuition with data: measure the actual distribution before assuming it matches your view. - Check the circle: notice when your sample is drawn entirely from people who already agree with you.
Anchor fast decisions
Your own position is the most available example when estimating what others think, so it anchors the estimate. Selection also operates: people spend time with those who share their views, which makes the consensus look broader than it is. The two combine into a systematic overestimate that reinforces itself with each confirming conversation.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/False_consensus_effectverified
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