Psychologycalendar_todayLast updated: Apr 2026
What is Cognitive Dissonance?
/ˈkɒɡnɪtɪv ˈdɪsənəns/
Cognitive dissonance is the mental discomfort felt when holding two contradictory beliefs, or when your actions conflict with your values — and the mental gymnastics used to resolve it.
lightbulb
Everyday Example
A smoker who knows cigarettes cause cancer but continues smoking experiences cognitive dissonance. They resolve it by telling themselves "I'll quit next month" or "my grandfather smoked and lived to 90."
publicReal-World Application
“Political beliefs are a prime source of cognitive dissonance — people often twist facts to align with their existing party loyalty rather than updating their views.”
psychology
Did you know?
The theory was developed by Leon Festinger in 1957 after he infiltrated a doomsday cult and studied how members reacted when the world did not end as predicted.
emoji_objects
Key Insight
We do not change our beliefs when our actions contradict them — we change our beliefs to justify our actions. This makes self-awareness extremely difficult.
Want to learn Cognitive Dissonance in 60 seconds?
Join 50,000+ learners snacking on knowledge daily.