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Glossary · Social Proof

Descriptive and Injunctive Norms

Also called social norms messaging, focus theory of normative conduct


What others do and what others approve of both guide behaviour, sometimes in opposite directions.

A descriptive norm is what most people actually do; an injunctive norm is what most people approve or disapprove of. Dr. Cialdini's research showed that messages can backfire when they highlight how common a bad behaviour is: in trying to condemn it, they tell the audience that everyone does it.

See which principles I use→Free · 16 questions
Where You Will See It

Telling people how many others already do the right thing, rather than how many do the wrong one, in reminders, public-health messages and internal campaigns.

Using It Ethically

Norms messaging must be true. Claiming that 'most people' do something they do not is a false statement, and it collapses the moment the audience checks.

Dr. Robert Cialdini

Know the terms. Now measure your own influence.

The Influence Assessment shows which of the seven principles you already use well, and which one is costing you.

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