Leon Festinger
The mind seeks its own consistency
The American social psychologist who explained why our beliefs bend to fit our actions.
techniques
When belief and action collide, it is often the belief that gives way.
Who they were
Leon Festinger noticed that people feel a real discomfort when their beliefs and behavior clash, and that they will quietly rewrite their thinking to make the tension go away. His theory of cognitive dissonance reshaped how psychologists understand persuasion, decision-making, and self-justification. With a famous field study of a doomsday group whose prophecy failed, he showed that disconfirmed believers often grow more fervent, not less. He also charted how we measure ourselves against others through social comparison, leaving a lasting mark on the field.
Famous books
What they left on the shelf
Terms they cared about
Ideas worth knowing
Their techniques
How the work was done
Their big idea
Cognitive Dissonance
Leon Festinger showed that holding two clashing beliefs, or acting against what we believe, creates an uncomfortable tension we are driven to resolve. Often we quietly change our minds to fit what we have already done, smoothing the story we tell ourselves.
Questions in their spirit
What they’d ask you
Sit with one. Answer online, or in the app.
Carry the idea forward
Festinger — What they’d ask you
Psipas asks you one small, honest question at a time — and builds the picture from your answers.