# Robert Cialdini - Persuasion Science > Robert Cialdini's 7 principles of persuasion with practical business applications: reciprocity, scarcity, authority, social proof, commitment & consistency, liking, and unity — from Influence (1984) and Pre-Suasion (2016) - Skill: `openlabor/robert-cialdini-persuasion-science` (Agent Skill) - Install (CLI): `npx skillmds@latest add openlabor/robert-cialdini-persuasion-science` - Raw SKILL.md: https://api.skillmd.com/api/skills/openlabor/robert-cialdini-persuasion-science/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: OpenLabor (https://skillmd.com/u/openlabor) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/openlabor/robert-cialdini-persuasion-science --- # Robert Cialdini - Persuasion Science Apply Cialdini's 7 scientifically validated principles of influence whenever writing copy, designing pages, crafting emails, building pitches, or creating any asset where someone needs to say yes. Each principle exploits a genuine psychological tendency that evolved because it usually produces good decisions. **Routes when user asks about:** persuasion, influence, why people say yes, sales psychology, marketing psychology, Cialdini, reciprocity, scarcity, social proof, authority, commitment, liking, unity, consent, ethical persuasion, conversion --- ## How to Use This Skill When creating or reviewing any persuasive asset (landing page, email, pitch, sales script, ad copy), apply the 7 principles below as a checklist. Score the asset against each principle, identify gaps, and strengthen the weakest ones. Always apply Pre-Suasion — establish the right frame before the main message. --- ## Principle 1: Reciprocity **The mechanism**: Humans feel obligated to return favors, gifts, and concessions. Gift → obligation to reciprocate. Concession → obligation to concede in return. Value given → goodwill and openness. ### How to Apply **Content marketing as reciprocity**: Publish genuinely useful content — frameworks, templates, tools — before asking for anything. Free resources that require no email are more powerful reciprocity triggers than gated content (though gated content works for lead generation). **The Free Sample**: Free trials, free consultations, free audits. The miniature gift creates felt obligation to purchase. **First-Give Negotiation**: In negotiations, make a concession early. The other party will feel compelled to match, often with a larger concession. **Surprise Gifts**: Unexpected gifts are more powerful than expected ones. Handwritten notes, unexpected upgrades, bonus content — stronger obligation than anticipated value. ### Checklist - [ ] What value are we giving before asking for anything? - [ ] Is the free value genuinely useful, or just a teaser? - [ ] Is the first move ours? (whoever gives first has leverage) - [ ] Is the gift personalized or personalization-adjacent? (personalized > generic) --- ## Principle 2: Scarcity **The mechanism**: People assign more value to opportunities that are rare or decreasing in availability. Loss aversion amplifies this — we fear losing access more than we desire gaining it. ### Two Types of Scarcity **Quantity scarcity**: "Only 12 remaining" — often works better because it implies social proof (others are buying). **Time scarcity**: "Offer expires Friday" — hard deadlines with legitimate reasons outperform soft deadlines. ### How to Apply **Limited editions**: Genuine limited editions create collector value and justify premium pricing. Works for physical products, digital cohorts/batches, and limited client slots. **Waitlists**: Admitting demand exceeds supply paradoxically increases demand. Notion, Clubhouse, and Superhuman built buzz through waitlists. **Early access pricing**: Combines scarcity (limited slots), reciprocity (they get a deal), and commitment (they bought early = invested). ### Ethics Checkpoint — Only Use Genuine Scarcity - [ ] Genuine quantity limits (you actually have X units/slots) - [ ] Real time limits (the cohort genuinely starts on this date) - [ ] Honest capacity constraints (you genuinely can only serve N clients) Never: "Only 3 left!" when you have unlimited inventory. Works once, destroys long-term credibility. --- ## Principle 3: Authority **The mechanism**: People defer to credible experts. We respond to signals of authority even when underlying expertise is absent. ### Signals of Authority (ranked by strength) 1. Demonstrated expertise (specific results, methodology, track record) 2. Third-party credentials (publications, awards, media features) 3. Titles and affiliations 4. Professional appearance and presentation 5. Confident, specific language ### How to Apply **Demonstrated > claimed expertise**: "We increased Acme Corp's conversion by 34% using this exact framework" > "We're conversion experts." **Specificity signals expertise**: "Average client increases retention by 23% in 90 days" > "We improve retention." Vague claims signal low confidence; specific claims signal deep knowledge. **Pre-Suasion**: Establish authority before the ask. Share a relevant credential, insight, or result before presenting the offer. ### Checklist - [ ] Do we lead with credentials or results? (results are stronger) - [ ] Are authority signals specific (numbers, names, publications) or generic ("industry leader")? - [ ] Is expertise established before key conversion moments? - [ ] Are authority claims third-party verified, not self-reported? --- ## Principle 4: Social Proof **The mechanism**: When uncertain, people look to behavior of similar others. "If everyone is doing X, X is probably right." ### Social Proof Types (ranked by persuasive power) 1. **Peers/Similar Others**: "People like you are already doing X" — most powerful 2. **Celebrities/Influencers**: Medium power, declining trust 3. **Expert endorsement**: High power for credibility-sensitive decisions 4. **Crowd proof**: Raw numbers — "10,000 customers" 5. **Certification/Awards**: Third-party validation ### How to Apply **Peer social proof**: "Founders at Series A companies use this" > "12,000 businesses use this." Specificity about who uses it beats raw numbers. **Real-time proof**: "14 people viewing this page right now" — triggers bandwagon + scarcity simultaneously. **Usage data as proof**: "Teams average 4.2 hours saved per week" shows adoption and results in one claim. **Case studies**: Feature a customer the prospect identifies with. Not your biggest logo — your most similar customer. **Warning — Negative social proof**: Never say "Most people don't do X" — it normalizes bad behavior. ### Strength Scoring (for each testimonial/proof element) | Dimension | Weak (1) | Strong (5) | |-----------|----------|------------| | Similarity to prospect | Generic "business owner" | Specific "Series A SaaS founder" | | Specificity of result | "Really helped us" | "Increased ARR by $2.3M in 6 months" | | Credibility of source | Anonymous | Named person, company, photo | Maximum score: 15. Below 9: rewrite or replace. --- ## Principle 5: Commitment and Consistency **The mechanism**: Once people commit to a position, identity, or action, they act consistently with it. Small commitments lead to larger ones. ### How to Apply **Foot-in-the-Door**: Get small yeses before large ones. Newsletter → lead magnet → webinar → free trial → paid plan. **Public > Private commitments**: Asking someone to share their goal publicly increases follow-through. **Written commitments**: Writing increases commitment strength. Onboarding flows that ask "What's your goal?" create commitment the user will feel compelled to fulfill. **Active > Passive**: Active choices ("I choose A") create stronger commitment than passive defaults. **The Identity Shift** — Most powerful form: tie commitment to identity: - "You're the kind of person who..." - "Our most successful customers are those who..." - "You've shown you're serious about X by..." Label customers with positive identities consistent with your product's benefits. --- ## Principle 6: Liking **The mechanism**: We comply with and buy from people we like. Dramatically underweighted in business contexts. ### The 5 Liking Factors 1. **Physical attractiveness**: Use high-quality photos of real, attractive people 2. **Similarity**: "We're a team of founders who got frustrated by X" > generic corporate voice 3. **Familiarity**: Mere exposure effect — consistent brand presence 4. **Compliments**: Genuine compliments increase liking; hollow flattery doesn't 5. **Association**: Alignment with people/things the audience already likes ### How to Apply **Brand voice**: Brands with distinct, likable personalities outperform generic ones. This is liking at scale. **Founder-led marketing**: A real person with real opinions is more likable than a faceless brand. Authentic failures are more likable than polished successes. **Mirror customer language**: Use the words they use, reference the problems they describe, reflect their worldview. --- ## Principle 7: Unity **The mechanism**: We are influenced by those who are part of our "we" — tribe, family, community. Goes beyond liking to shared identity. **Unity vs. Liking**: Liking = "You're similar to me." Unity = "You are one of us." ### How to Apply **Community building**: Users who feel part of a community (not just a user base) have dramatically higher retention. The "we" identity makes leaving feel like abandoning the tribe. **Shared struggle**: "We built this because we suffered through the same problem" creates unity. Shared struggle binds more strongly than shared success. **Co-creation**: Involving customers in product decisions creates invested advocates. Advisory boards, beta groups, design partners. **Insider language**: Communities develop their own vocabulary. Adopt and amplify it. --- ## The Pre-Suasion Framework From *Pre-Suasion* (2016): the moment before the request is as important as the request itself. Priming the right mental state doubles effectiveness. **Attention directs focus**: What people attend to first shapes how they process everything after. Start with the customer's most acute pain. **Unity before ask**: Establish shared identity before making a request. "As someone who cares about X..." **Credibility before content**: State most relevant credential in the first sentence. **Positive framing**: "Are you an adventurous person?" before an adventurous ask — they'll act consistently with "yes." --- ## The Persuasion Audit Score any marketing asset (page, email, sales script, pitch deck) on all 7 principles: | Principle | Present? | Strength (1-5) | Improvement | |-----------|----------|---------------|-------------| | Reciprocity | | | | | Scarcity | | | | | Authority | | | | | Social Proof | | | | | Commitment | | | | | Liking | | | | | Unity | | | | **Minimum viable**: Score 3+ on Social Proof, Authority, and Liking for any marketing asset. **Target**: All 7 principles present, average score 4+. --- ## Sources - *Influence: The Psychology of Persuasion* — Robert Cialdini (1984, revised 2021) - *Pre-Suasion: A Revolutionary Way to Influence and Persuade* — Robert Cialdini (2016) - *Influence at Work* — Cialdini Group training materials - Freedman & Fraser (1966), "Compliance without pressure: the foot-in-the-door technique"