{
  "schema_version": "1.1",
  "id": "products-with-5-reviews-270-percent-more-likely-purchased",
  "slug": "products-with-5-reviews-270-percent-more-likely-purchased",
  "url": "https://groundedkit.com/claims/products-with-5-reviews-270-percent-more-likely-purchased/",
  "api_url": "https://groundedkit.com/api/claims/products-with-5-reviews-270-percent-more-likely-purchased.json",
  "claim": "A product with five reviews is 270% more likely to be purchased than one with no reviews",
  "commonly_cited_as": "\"Reviews increase conversions by 270%\"",
  "verdict": "verified",
  "verdict_definition": "Primary source found; it says the same thing, the scope matches, and it is reasonably current.",
  "confidence": "medium",
  "rating": {
    "value": 5,
    "best": 5,
    "worst": 1
  },
  "origin": {
    "publisher": "Spiegel Research Center, Northwestern University (with PowerReviews)",
    "title": "How Online Reviews Influence Sales (2017)",
    "year": "2017"
  },
  "quote": "The purchase likelihood for a product with five reviews is 270% greater than the purchase likelihood of a product with no reviews. ... when reviews were displayed for a lower-priced product, the conversion rate increased 190%. However, for a higher-priced product, the conversion rate increased 380%.",
  "method": "Analysis of e-commerce review and purchase data supplied by PowerReviews, by Northwestern's Spiegel Research Center; sample details are in the full report, not on this page.",
  "drift": [
    "Often generalized to 'reviews increase conversion 270%'; the figure compares five reviews with zero reviews",
    "Data partner PowerReviews sells review software"
  ],
  "interest": "PowerReviews, which supplied the data, sells ratings and reviews software.",
  "safe_rephrasing": "Northwestern's Spiegel Research Center (2017, PowerReviews data) found products with five reviews were 270% more likely to be purchased than products with none; gains flatten after the first five.",
  "sources": [
    {
      "title": "Spiegel Research Center — How Online Reviews Influence Sales",
      "url": "https://spiegel.medill.northwestern.edu/how-online-reviews-influence-sales/",
      "primary": true
    }
  ],
  "kind": "stat_check",
  "as_of": "2017 report",
  "last_checked": "2026-10-16",
  "stale": false,
  "date_reviewed": "2026-10-16",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/"
}