Psychology of Influence: The 7 Principles of Cialdini

The Science of Persuasion

Robert Cialdini ("Influence: The Psychology of Persuasion", 1984; "Pre-Suasion", 2016) is a social psychologist who systematized the mechanisms of persuasion. His research: he worked undercover in organizations that use persuasion (sales, advertising, recruitment) and analyzed what actually works. The result — seven principles that exploit people's psychological “autopilots.”

The Seven Principles

1. Reciprocity: we feel obliged to give back what was given to us. A free sample, a small gift, or taking the first step — all create a sense of obligation. Application: give first and freely. Limitation: if the gift is perceived as manipulation — the effect is the opposite.

2. Commitment & Consistency: having made a commitment — big or small — we are inclined to stick to it (so as to appear consistent). Foot-in-the-door: start with a small request, then ask for a bigger one. Application: ask for small agreement first (“Do you agree that employee safety is important?”).

3. Social Proof: in uncertainty, we do what others are doing. Reviews, ratings, “99% of customers are satisfied”, a crowd at a restaurant. Most powerful under conditions of uncertainty and when “others” seem similar to us.

4. Authority: we follow authorities — experts, people in uniform, with certificates. A doctor in a lab coat persuades differently than a doctor in a suit. Application: demonstrate competence; allow third parties to speak about your authority.

5. Liking: we agree more readily with those we like. Three sources of liking: physical attractiveness, similarity (“Are you also from St. Petersburg?”), familiarity (mere exposure increases liking). Application: seek genuine similarity; offer sincere praise.

6. Scarcity: what is rare is more valuable. “Only three spots left”, “only until Friday.” Application: if the scarcity is real — mention it. Artificial scarcity is effective short-term but destructive long-term.

7. Unity — added in 2016: we respond more strongly to those whom we consider “our own” (family, tribe, identity). “Us versus them.” Application: create a sense of belonging to a shared group.

The Ethics of Influence

The principles work regardless of intention. The difference: influence (working with a person’s actual interests through psychological mechanisms) vs. manipulation (exploiting mechanisms against the person’s interests). Cialdini: use the principles to align information, not to create artificial gains.

Question for reflection: Review the marketing materials for your product or service. Which of the seven principles are used in them? Which are not used, though they could naturally fit in?