Cialdini's Influence and the principles of persuasion

What happened

Robert Cialdini published Influence: The Psychology of Persuasion in 1984. His company, Influence at Work, now presents the work as seven principles: reciprocity, scarcity, authority, consistency, liking, social proof and unity. A reference page says Cialdini worked undercover in compliance fields such as car sales and door-to-door sales. The book itself was not opened, so its chapters and method are not described here.

The psychological idea

The company page treats each principle as a shortcut for decisions. People repay what they receive, want what is harder to get, follow credible experts, act in line with earlier commitments, prefer people they like and look to others when uncertain. The page gives no methods, sample sizes or citations, and it attributes the principles to Cialdini's own research.

In practice

The company page cites examples as results, such as restaurant mints raising tips by about 3 per cent and hotel towel cards citing that 75 per cent of guests reuse towels. These are company self-report. In the underlying 2008 field experiment, as reported by a later paper, towel reuse was 44.1 per cent with the descriptive message and 35.1 per cent with a standard environmental message in the first study.

Why it mattered

Cialdini's company presents the principles as practical guidance for persuasion in business. The 2008 towel experiments, co-authored by Cialdini, gave social proof a field test in a consumer setting. Their abstract reports that messages describing what most other guests do outperformed a conventional message, and that the closest comparison group worked best.

Evidence behind the claims

• Influence at Work presents seven principles (reciprocity, scarcity, authority, consistency, liking, social proof and unity), attributes them to Cialdini's own research, and gives no methodology, sample sizes or citations.

  Company self-reportSource: [1]Where: Whole principles page

• The company page reports that one restaurant mint raised tips by about 3 per cent and that hotel towel cards citing that 75 per cent of guests reuse towels raised reuse by 26 per cent, without saying whether the rise is relative or absolute.

  Company self-reportSource: [1]Where: Reciprocity and Social proof sections

• Goldstein, Cialdini and Griskevicius report two field experiments in which signs describing what most other guests do worked better than a standard environmental appeal, and descriptive messages worked best when they referred to the group closest to the guest's situation, such as guests in the same room.

  Experimental findingSource: [2]Where: Abstract as returned in the Crossref recordChecked at abstract level

• As reported by Bohner and Schluter, Goldstein and colleagues found 44.1 per cent reuse with the descriptive norm against 35.1 per cent with the standard message in the first study, and 49.3 per cent for the same-room norm against 37.2 per cent for the standard message in the second.

  Experimental findingSource: [3]Where: Introduction summary of Goldstein et al. (2008)

• In Bohner and Schluter's first German hotel (724 observations) overall reuse was 82.3 per cent and descriptive norms (81.9 per cent) did not beat the standard message (83.7 per cent); in the second hotel (204 observations) the standard message (93.3 per cent) outperformed the descriptive norms combined (76.5 per cent).

  Experimental findingSource: [3]Where: Results, Studies 1 and 2

• Bohner and Schluter describe their work as a direct and extended replication, and note that each study used one hotel, that the second study was underpowered, and that baseline reuse was higher than in the US studies so a 75 per cent norm may have been too weak.

  DocumentedSource: [3]Where: Introduction, limitations and discussion

• An Internet Archive catalog lists Influence: The Psychology of Persuasion with a 1984 date, and a reference page says it first appeared in 1984 and that Cialdini worked undercover in compliance fields such as car sales and door-to-door sales.

  DocumentedSources: [4] [5]Where: s4 catalogue listing; s5 page text (reference page, orientation only)Checked at page level

People involved

• Robert Cialdini. Psychologist and author of Influence
• Noah J. Goldstein. Co-author of the 2008 hotel towel field experiments
• Vladas Griskevicius. Co-author of the 2008 hotel towel field experiments
• Gerd Bohner. Co-author of the 2014 German hotel replication
• Lena E. Schluter. Co-author of the 2014 German hotel replication

In the Psy101 course

• OpenStax Psychology 2e, section 12.3: Attitudes and PersuasionChapter 12, Social Psychology. Concept. The section discusses this topic.The reviewer opened the page: it cites Cialdini for foot-in-the-door and consistency and covers the Freedman and Fraser study. It does not discuss social proof or reciprocity.
• OpenStax Psychology 2e, section 12.4: Conformity, Compliance, and ObedienceChapter 12, Social Psychology. Context. The section discusses this topic.The reviewer opened the page: it defines compliance and discusses informational social influence. It does not mention Cialdini or name his principles.

This is course relevance only. It is not evidence for the historical or corporate claims on this page.See the full course map.

Sources and inspection

5 of 5 sources were opened and read at the level shown. A source marked as not verified supports no claim on this page by itself.

1. [1]
   7 Principles of PersuasionInfluence at Work. Influence at Work, 2024. Company document. Company document.Company document readRead the page as returned by the fetch tool. It is the author's company, so every example is company self-report. The page does not say whether its percentages are relative or absolute, and it is not clear which dated version of the text was read.
2. [2]
   A Room with a Viewpoint: Using Social Norms to Motivate Environmental Conservation in HotelsGoldstein, N. J.; Cialdini, R. B.; Griskevicius, V.. Journal of Consumer Research, 35(3), 472-482, 2008. Journal article. Primary source.Abstract or publisher record onlyRead the abstract through the Crossref record. The article was not opened, so the original sample sizes are not stated.
3. [3]
   A Room with a Viewpoint Revisited: Descriptive Norms and Hotel Guests' Towel Reuse BehaviorBohner, G.; Schluter, L. E.. PLOS ONE, 9(8), e104086, 2014. Journal article. Critique or replication.Relevant text checkedRead the open-access article as returned by the fetch tool: introduction, results for both studies and the limitations. Tables 1 and 2 are images and were not read. Its account of the 2008 figures is second-hand.
4. [4]
   Influence: The Psychology of Persuasion (Internet Archive catalogue listing, 1984)Cialdini, R. B.. Internet Archive search listing, 1984. Book. Primary source.Archive page readRead an Internet Archive search listing that gives 1984 for two entries. The book text was not opened, and one entry may be an audiobook.
5. [5]
   Influence: Science and PracticeWikipedia contributors. Wikipedia, 2026. Reference work. Secondary account.Reference article readOrientation only. The page carries a needs-more-citations banner and says little about method, so Cialdini's observation of compliance professionals is stated only as what this page says.

Access note: Influence itself, Influence at Work's own surveys and Cialdini's research method were not opened or verified. Principles other than social proof were not tested against independent studies.

Independent source review: Claude review agent, independent of the research agent, 2026-10-21. Verdict: pass-with-edits.

Related records and elsewhere on Psy101

• Asch's line-judgment studies
• Milgram's obedience experiment
• The Yale persuasion studies and Communication and Persuasion
• The MusicLab artificial music market