4.8
Cialdini's Six Principles
Six levers of persuasion — reciprocity, commitment, social proof, authority, liking, scarcity — presented as a general toolkit for changing behaviour.
Robert Cialdini, Influence (1984)
What it does
Gives a vocabulary for the mechanics of persuasion and a usable checklist for any message that asks someone to act now — a checkout page, a sales email, a donation appeal. Within that narrow band, where a decision is actually being made and the ask is explicit, the principles describe real levers.
When it breaks
It breaks when laboratory effects are assumed to transfer at laboratory size. Several of the underlying findings shrink sharply or fail to reproduce in field replication. It breaks harder when the principles are applied to brand advertising, where the audience is not deciding anything — scarcity aimed at someone who was not going to buy either way is a message with no mechanism. Compliance research generalises badly to advertising, which is mostly not asking for compliance.
Case
The hotel-towel study — descriptive social norms lifting reuse rates — is one of the most cited demonstrations of social proof. Bohner and Schlüter ran two high-powered replications and found no significant effect of the descriptive-norm message on towel reuse, and reviewed further attempts with similarly mixed results.
Bohner & Schlüter — Descriptive norms and hotel guests' towel reuse behavior (replication) ↗Diagram — not yet drawn
The six principles arranged along an axis of how close the audience is to a decision; the effects drawn as bars that are tall at the point of purchase and taper to nothing at the far end where brand advertising sits.
In the wild
Unvetted · not part of the tier assessment
What has been written about this tool in the last twelve months. Machine-retrieved and unchecked — everything above this line was checked.
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