A gym’s website says, “Join the 4,000 people in your town who already train with us.” Which of Cialdini’s principles is used?
- No gift is offered, so it is not reciprocity; no expert is named, so it is not authority.
- No limit on time or numbers is given, so it is not scarcity.
- The message points to what many other people already do.
Answer: Social proof: people follow the behaviour of others, especially others like themselves.