Robert Cialdini's Influence: key ideas
Psychology and marketing professor Robert Cialdini is known for research into influence and persuasion. His book Influence: The Science of Persuasion is a classic. This article reviews its main ideas.
A central idea in Cialdini's book is that people are influenced by others and their environment. He identifies persuasion principles including authority, social proof, social influence, liking and scarcity.
Principles of influence psychology
The authority principle means people give weight to expert authority. A well-known doctor's recommendation, for example, may influence a medicine purchase.
The principle of social proof means people often follow others rather than act independently. Widely adopted behaviour is more likely to seem socially acceptable.
The principle of social influence says people give more weight to those they feel close to or consider friends. That relationship increases influence.
The liking principle means people trust those they like or identify with. Salespeople use this to create a positive atmosphere and encourage consideration of a purchase.
The scarcity principle means people value limited availability or things they may lose. Communicating genuine scarcity can increase demand and support promotions or special offers.
Understanding influence can help marketing and sales communicate persuasively. Apply the principles respectfully, without manipulation or deception.
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