Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
5.0 out of 5 starsand the examples make it really easy to follow
Reviewed in India on 27 June 2016
Superbly written, a very informative and hugely fascinating read. You get to know about body signals that was never heard before. .and the examples make it really easy to follow. Must read for people interested in people.