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MENTAL MODEL · M3639

Commitment and Consistency

Commitment and Consistency
BehaviormediumSocial Psychology
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Updated 2026-08-05

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INTRODUCTION

English translation pending.

CORE DEFINITION

A principle of influence described by Robert Cialdini in Influence and grounded in Leon Festinger's theory of cognitive dissonance. Its core proposition is that people strive to appear and feel consistent, so an initial commitment, especially one that is active, public, and freely chosen, creates pressure to accept later requests that follow from it. The key constraint is that the commitment must be voluntary; commitments extracted by pressure or obvious inducement carry little force, because the person can discount them as not genuinely their own.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Request sequencing: open with a small request the person can freely accept, and let the larger request follow from it. - Commitment design: make the first agreement public, written, and self-generated, since those properties raise its binding force. - Consistency check: notice when you are defending a position only because you previously stated it.

anchor

Anchor fast decisions

A stated position becomes part of how a person sees themselves, and behaving inconsistently with it produces dissonance that is uncomfortable to hold. Because the self-image was formed through a free choice, the person cannot dismiss the commitment as coerced, so the cheapest way to reduce dissonance is to act consistently with it. Public commitments are stronger because inconsistency is then visible to others as well as to oneself, which doubles the pressure.

MINIMUM ACTION

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Source support: Explicit

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    bbc.comhttps://www.bbc.com/future/article/20240918-influence-the-unseen-key-behind-powerful-persuasionZH · Explicit
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