The Moral Landscape: How Science Can Determine Human Values
More product info
From Sam Harris
Refresh the report to view the most up-to-date data available:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Most Trusted Reviews
TRUST
- Verified Purchaser
- Easy Grader (avg. rating: 4.5)
Least Trusted Reviews
TRUST
- Unverified Purchaser
- Created on a high volume day
- Brand Loyalist (2 of 4 reviews for this brand; avg rating: 5.0)
- Overrepresented Participation (posted 4 Reviews)
- Easy Grader (avg. rating: 5.0)
Analysis Details
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- 25%
- Created over 16 days
We counted 611 reviews for this product over the span of 3,671 days, an average of 0.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.
However, we see the following 16 days exceeding this threshold:In total, we found that 155 reviews were created on just 16 days. The reviews on these high volume days have rated this product an average of 4.7 while reviews from other days have rated this product an average of 3.9. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
We discovered a total of 10 deleted Reviews for this product, with an average rating of 3.4. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.
Brand Loyalists
19 of the 611 reviewers have reviewed multiple products but half or more of their reviews are for this brand. While this is more Brand Loyalists than we'd expect to see, the discrepancy in ratings between the Brand Loyalists and non-loyalists isn't significant enough to rule out the possibility of it being due to random chance.
One-Hit Wonders
79 of the 611 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, the discrepancy in ratings between the One-Hit Wonders and reviewers who have posted more than one review isn't significant enough to rule out the possibility of it being due to random chance.
Take-Back Reviewers
160 of the 611 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.
80 of the 611 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.
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- 64%
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 389 reviewers (or 64%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
247 of the 611 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
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- 0%
- Have an overrepresented word count
Read more about our Word Count Comparison test.
7% also reviewed:
The God Delusion by Richard Dawkins
7% also reviewed:
God Is Not Great: How Religion Poisons Everything by Christopher Hitchens
5% also reviewed:
Why Evolution Is True by Jerry A. Coyne
5% also reviewed:
The Greatest Show on Earth: The Evidence for... by Dawkins, Richard
4% also reviewed:
A Universe from Nothing: Why There Is Something... by Lawrence M. Krauss
4% also reviewed:
The Magic of Reality: How We Know What's... by Richard Dawkins
3% also reviewed:
The Better Angels of Our Nature: Why Violence Has... by Steven Pinker
3% also reviewed:
Selfish Gene, The by Richard Dawkins
3% also reviewed:
Sapiens: THE MULTI-MILLION COPY BESTSELLER by Yuval Noah Harari
114 of the 611 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
4.1 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.