Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
The best parenting expert I have EVER read! Her ideas are revolutionary & her parenting style can change the world. Dr Shefali Tsabary, I wont be forgetting that name any time soon. Cannot wait for her next book.