4.8
Cialdini's Six Principles
Six levers of persuasion presented as a general toolkit for changing behaviour: reciprocity, commitment, social proof, authority, liking, scarcity.
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, where descriptive social norms lifted 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) ↗In the wild
Unchecked · not part of the tier
What people have written about this tool in the last twelve months. A machine found these and nobody has read them. Everything above this line was checked by hand.
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