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From John Scalzi
This report was last updated 10/6/2023.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Note: We only analyze "reviews" and ignore one-tap "ratings".
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Report Card
Warn Overall Grade
FAIL 
Suspicious Reviewers
Suspicious ReviewersFAIL Phrase Repetition
Phrase RepetitionWARN Rating Trend
Rating TrendPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Overlapping Review History
Overlapping Review HistoryPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized ReviewsPASS Deleted Reviews
Deleted ReviewsN/A Reviewer Participation
Reviewer Participation
Most Trusted Reviews
John Scalzi is a wonderful author. He keeps coming up ... [Go to full review]
Oct 1, 2023
100%
TRUST
TRUST
-
Verified Purchaser
-
Easy Grader (avg. rating: 4.4)
Unverified Purchaser
Contains repetitive phrases 
Least Trusted Reviews
Enjoyable book for me. Scalzi's storytelling and superb inner narratives ... [Go to full review]
Sep 26, 2023
0%
TRUST
TRUST
-
Verified Purchaser
-
Created on a high volume day
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Take-Back Reviewer (1 deleted Review; avg. rating: 5.0) -
Overlapping Review History: reviewed 1 of 9 top products -
Critical Reviewer (avg. rating: 3.5)
One-Hit Wonder
Analysis Details
Fail Suspicious Reviewers
Suspicious Reviewers
One-Hit Wonders
Less than approximately 10% of 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
Approximately 30% of reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 3.9 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 4.8. 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.
Fail Phrase Repetition
Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Reviews:
Show MoreShow Less
~9% of reviews
(4.7/5)
(4.7/5)
~9% of reviews
(3.7/5)
(3.7/5)
~6% of reviews
(5.0/5)
(5.0/5)
~6% of reviews
(5.0/5)
(5.0/5)
~6% of reviews
(5.0/5)
(5.0/5)
~6% of reviews
(5.0/5)
(5.0/5)
~6% of reviews
(5.0/5)
(5.0/5)
~6% of reviews
(5.0/5)
(5.0/5)
~6% of reviews
(4.5/5)
(4.5/5)
~6% of reviews
(5.0/5)
(5.0/5)
Approximately 75% of reviews use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.7 while reviews without substantial repetitive phrases rated this product an average of 4.1. 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.
Warn Rating Trend
Rating Trend
It appears that several reviews were created during just a short period of time.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Unverified Purchases
Unverified Purchases
45 of the 1,483 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.
Pass Word Count Comparison
Word Count Comparison
-
- <10%
- Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.
Read more about our Word Count Comparison test.
Pass Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
~15% also reviewed:
The Collapsing Empire (The Interdependency Book 1) by John Scalzi
<10% also reviewed:
Project Hail Mary: A Novel by Andy Weir
<10% also reviewed:
Head On: A Novel of the Near Future (Lock In) by John Scalzi
<10% also reviewed:
The Last Emperox (The Interdependency, 3) by John Scalzi
<10% also reviewed:
Gideon the Ninth (The Locked Tomb Series, 1) by Tamsyn Muir
<10% also reviewed:
The Haunting of Tram Car 015 by P. Djèlí Clark
<10% also reviewed:
The Consuming Fire: The Interdependency, Book 2 by John Scalzi
<10% also reviewed:
The Long Way to a Small, Angry Planet: Wayfarers,... by Becky Chambers
<10% also reviewed:
Fated Sky (Lady Astronaut, 2) by Mary Robinette Kowal
Approximately 30% of 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.
Pass Reviewer Ease
Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.3, while the average ease score for reviewers in this category is 4.3.
4.3 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass Incentivized Reviews
Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
-
- <10%
- Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Pass Deleted Reviews
Deleted Reviews
- 0
- Reviews have been deleted
We have not discovered any deleted reviews for this product.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
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.