Amazon.com: Customer reviews: Mental Training: Use These Brain Training and Mental Toughness Techniques to Develop An Unbeatable Mind, Learn How to Have Unlimited Memory, Gain True Grit, and Have a Training Mindset for Life
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.