A Theory of Cognitive Dissonance · Leon Festinger

Cognitive dissonance examples

Curated by · reviewed 2026-05-31

Cognitive dissonance is the discomfort of holding two clashing beliefs — or acting against what you believe — which we quietly resolve by changing the belief to fit the action. Examples:

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5 examples of cognitive dissonance

  1. After a big purchase

    You buy an expensive car, then notice every flaw — and talk yourself into how worth-it it was, to quiet the doubt.

  2. Smoking and 'it's fine'

    A smoker who knows the risks decides the evidence is overblown, rather than sit with the conflict.

  3. Effort justifies the result

    People who endure a brutal initiation rate the group more highly — the pain demands the group be worth it.

  4. Sour grapes

    Turned down for a job, you decide you didn't really want it anyway.

  5. Defending a choice

    After backing someone or something, you downplay the flaws and amplify the wins to stay consistent with your decision.

How to spot it in yourself

You'll forget most of this by next week.

That's just how memory works. Lock cognitive dissonance in with a 5-minute active-recall session — spaced repetition, no signup.

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