Robert Cialdini
Three undercover years in sales jobs, one book, seven principles — the field manual of ethical persuasion.
- Name
- Robert B. Cialdini
- Born
- 1945, Milwaukee
- Post
- Regents' Professor Emeritus, Arizona State
- Key work
- Influence (1984)
Forms & parts of speech
Who he is, in plain terms
Robert Cialdini is the experimental psychologist who spent three years working undercover in sales, fundraising, and advertising jobs to study persuasion from the inside, then published Influence: The Psychology of Persuasion (1984). It became the best-selling social-psychology book ever written and the one marketing book lawyers, doctors, and diplomats also read.
The key ideas
Six principles in the original — reciprocity (we repay favors), commitment and consistency (we honor small prior commitments), social proof (we copy similar others, especially under uncertainty), authority (we defer to credible expertise), liking (we say yes to people we like), and scarcity (we want what is running out). Pre-Suasion (2016) added the seventh, unity — shared identity — and showed the moment BEFORE the message often decides its fate.
Why he still matters
Review counts, "only 3 left" labels, free samples, expert badges, and waitlists are his principles wearing product clothes. His own warning travels less well — each principle works because it usually points at truth, so faking the signal (fabricated reviews, false scarcity) is both unethical and, once detected, permanently expensive.
Synonyms & antonyms
Synonyms
Origin & history
Born 1945 in Milwaukee, Wisconsin; PhD in social psychology (University of North Carolina, 1970). Influence grew from three years of participant observation inside sales and fundraising organizations, published 1984 after academic reviewers pushed him toward a general audience.
Etymology: source.
Usage trends
Search interest for this term over the last five years:
Common questions
- Who is Robert Cialdini?
- American social psychologist (born 1945), Arizona State professor, and author of Influence — the standard work on persuasion.
- What are Cialdini's principles?
- Reciprocity, commitment and consistency, social proof, authority, liking, scarcity — plus unity, added in Pre-Suasion (2016).
- How should marketers use Cialdini?
- Surface honest signals of each principle — real reviews, real expertise, real deadlines. Faked signals backfire once detected.
Related tools & calculators
Resources & people to follow
- bookInfluence — The Psychology of Persuasion — Robert Cialdini
- bookPre-Suasion — Robert Cialdini
- referenceWikipedia — Robert Cialdini
Curated, non-competitor resources verified per term.
Related training
- moduleCRO & experimentation
Disciplines
Areas of marketing where robert cialdini is a core concern: