What is Cognitive Dissonance?

Cognitive Dissonance is the psychological discomfort we experience when our beliefs, attitudes, or behaviours conflict with one another. First described by Leon Festinger, the theory suggests that people are naturally motivated to reduce this discomfort, often by changing their thoughts, attitudes, or actions.

The interactive cards below explain this concept through simple illustrations, classic experiments, and everyday examples.

Key Takeaways

• Cognitive dissonance occurs when beliefs and behaviours are inconsistent.

• People often try to reduce this discomfort by changing their thinking or behaviour.

• The process influences decision-making, attitudes, and everyday choices.

• Cognitive dissonance is a normal part of human psychology.

Common Misconceptions

"Cognitive dissonance is a mental illness."

It is not. Cognitive dissonance is a normal psychological process experienced by everyone. It reflects the mind's tendency to seek consistency between thoughts, beliefs, and actions.

Why Does This Matter?

Understanding cognitive dissonance helps explain why people justify decisions, hold conflicting beliefs, or resist changing their opinions. It remains one of the most influential concepts in social psychology and behavioural science.

References

Festinger L. A Theory of Cognitive Dissonance. Stanford University Press; 1957.

Festinger L, Carlsmith JM. Cognitive consequences of forced compliance. Journal of Abnormal and Social Psychology. 1959;58(2):203–210