Technique · Influence
Verified, representative reviews
Show reviews the way they are: the full star distribution, verified-buyer labels, dates, critical reviews with replies, disclosed incentives, and a link to every review in place of a hand-picked wall. Representative proof is believed; a wall of five-star quotes is discounted.
Plain label: full, verified rating pictureAlso known as: verified reviews, rating distribution, review display, critical reviews
How it works
Social proof is only as useful as the evidence behind it, and people who rely on it stop checking, so curated or faked proof passes until it is exposed. Displays that show the whole distribution and label verified buyers keep the cue trustworthy, which protects every later use of it. They also set accurate expectations, which reduces returns.
In the book. Selection-biased testimonials and actor "consumers" still sell, which is why the author recommends ignoring them (Ch.4, pp.118-121). INF-T-SP-24 (Influence Ch.4, p.120)
In a product [S]. Representative, verified and dated reviews, with critics included.
Evidence Evidence grade B. Moderate evidence: solid studies with some limits.. Reputation systems measurably shift trust in field data.
Evidence warning
Fake reviews and undisclosed incentives are a target of the US FTC 2024 rule; disclose any incentive next to the review.
What the research says
The book describes street-interview ads that show only fans, and actors posing as ordinary consumers, and says the author ignores such "people" when he buys.
Influence Ch.4, pp.118-121
In an online experiment with about 8,900 participants, checked against real platform data, stronger reputation signals shifted trust toward hosts less similar to the guest.
Abrahao, Parigi, Gupta & Cook, PNAS, 2017
Before you start
- Purchase or usage data to mark reviews as verified
How to build it
- E-commerce
- Show the star histogram, a verified-purchase label, the date, and the most helpful critical review with the seller's reply above the fold.
- Web
- On the pricing page, replace a quote carousel with the current average and a link to all reviews on an independent platform.
- B2B
- Link logos and quotes to the full review profile on a third-party site.
What can go wrong
- Hiding or burying critical reviews.
- Incentivized reviews without disclosure.
- Showing a rating without the count.
Pairs well with
- Pairs with in-t-cc-18: ask every user, not only the happy ones.
- Pairs with in-t-sp-12 at checkout.
In practice
Where it shows up
Airbnb · 2017
RoundAirbnb: reputation beats similarity
In an experiment with 8,906 Airbnb users, high reputation significantly increased trust between dissimilar users, offsetting the pull toward similar others; analyses of about 1M real Airbnb interactions agreed (Abrahao et al., PNAS, Sept 2017).
M3 ×DiscoverStayCase grade for the number: A. Evidence grade for the mechanism link: A.Mercado Libre · 2026
Mercado Libre: seller reputation as currency
Q2 2026 (8-K, Aug 5, 2026): 89M unique active buyers (71M a year earlier, +26%), fintech monthly users 88M (+30%), MELI+ subscribers up 72% YoY (no absolute number), and users active in both commerce and fintech up 37%. Many causes; the mechanism link is our inference.
M4 ×StayPayCase grade for the number: A. Evidence grade for the mechanism link: D.Analyst inferenceCorrelational
Limits
What we don’t claim
- Left Brain and Right Brain are a metaphor for extrinsic and intrinsic motivation, not a claim about neuroscience.Actionable Gamification Ch.13, pp.342-343
Sources
Influence · Robert Cialdini
Ch.4, p.120
Reputation offsets trust judgments based on social biases among Airbnb users · Proceedings of the National Academy of Sciences, 2017
Evidence grade B. Moderate evidence: solid studies with some limits.
Source IDs: INF-T-SP-24
Book content is paraphrased, never quoted at length. Last verified October 24, 2026.
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