Uncover the variables involved in Amazon Review rating and the formula for calculating Review score

The variables involved in review scoring are as follows: (1) Age of a review (the time difference between the submission and now) (2) Whether a review is verified purchase or unverified (3) Whether the reviewer has left 1 review -- The total number of reviews written by a reviewer (4) Length of a review (5) The number of helpful votes (6) The number of total votes The review score is calculated as follows: ((H+C1+log(min(Length,1750)) / log (350)+ X/2 × Trust + X/2 × Recency)) / ((T+C2)) H: the number of helpful votes a review received T: the number of total votes a review received X: log(1750) / log (C2) Length: length of a review Trust: If the review is verified purchase: 2 * C1, C2, and C3: Constants set differently by marketplace. In the US, C1, C2, and C3 are 13.1056, 350, and 20.04, respectively. Summary: It can be seen that the score of the review on the detail page involves a variety of comprehensive factors such as review quality, length, authenticity, etc., to ensure that buyers are provided with objective and accurate reference.

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