Behavioral Design

Robert Cialdini

Properties2
tagsperson, psychologist, persuasion, social-psychology
aliasesRobert Cialdini, Cialdini

3 min read

Robert Cialdini

American social psychologist (Regents’ Professor Emeritus, Arizona State University), best known for his work on persuasion and influence — frequently called the “Godfather of Influence.” Author of Influence: The Psychology of Persuasion (1984; expanded edition 2021) and Pre-Suasion: A Revolutionary Way to Influence and Persuade (2016). His framework was developed by infiltrating the training programs of the major influence professions (car sales, insurance, portrait-photography sales, fundraising, recruiting, even cults) and looking for what worked across all of them.

The seven principles

The original 1984 Influence contained six. The 2021 expanded edition added Unity — Cialdini concluded he had been wrong to consider it merely an extension of liking-via-similarity.

  1. Reciprocation — people feel obliged to give back to those who give first
  2. Commitment and consistency — people want to act consistently with prior public commitments
  3. Social proof — when uncertain, people use the choices of others to guide their own
  4. Liking — people say yes to people they like (driven by similarities + praise)
  5. Authority — people defer to credentialed expertise (note: an authority, not in authority)
  6. Scarcity principle — people value what is limited or about to be lost
  7. Unity — people inside a “we” group support and compromise with one another (added 2021)

Pre-suasion

Cialdini’s 2016 book argues that what you say or do before sending a message is at least as important as what’s in the message — by setting a frame, you bias how the message is received. → see Pre-suasion.

Why he matters here

Cialdini’s principles are foundational to nearly every other persuasion or behavioral concept on this wiki:

  • Mobile-game design: commitment, scarcity, and reciprocity drive monetization (the first $0.99 purchase, countdown timers, friend-gift mechanics).
  • Public-discourse pathology: Naval Ravikant’s framing of social media as a “mass public extraction machine” runs entirely on the consistency principle.
  • Online conversion: an A/B-test meta-study across 6,700 e-commerce sites Cialdini cites found that the top six conversion factors were the six original principles of influence, with scarcity at #1 — outperforming search functions, free shipping, and other technological / economic levers.

Methodology note

The decade-plus of incognito training-program infiltration is what makes the principles cross-domain rather than lab-bound. Cialdini was looking for what salespeople, fundraisers, recruiters, and cults all did, on the theory that the universals would survive in any new context. The seven principles are the residue of that filter.

Sources

Graph View