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From Rachel Caine
This report was last updated 3/22/2021.
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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Report Info:
Note: While Amazon.com claims 16,506 Ratings, we counted 12,807 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Warn Overall Grade
FAIL 
Phrase Repetition
Phrase RepetitionWARN Deleted Reviews
Deleted ReviewsWARN Rating Trend
Rating TrendWARN Suspicious Reviewers
Suspicious ReviewersWARN Reviewer Ease
Reviewer EaseWARN Word Count Comparison
Word Count ComparisonWARN Reviewer Participation
Reviewer ParticipationPASS Unverified Purchases
Unverified PurchasesPASS Overlapping Review History
Overlapping Review HistoryPASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized Reviews
Most Trusted Reviews
I binged this book in one sitting. It is taut, ... [Go to full review]
Jun 1, 2017
52%
TRUST
TRUST
-
Verified Purchaser
-
Overrepresented Participation (posted 9 Reviews) -
Easy Grader (avg. rating: 5.0)
Least Trusted Reviews
Loved how by the third page it took off like ... [Go to full review]
Jun 10, 2017
0%
TRUST
TRUST
-
Verified Purchaser
-
Created on a high volume day -
Overrepresented word count (35 words) -
Contains repetitive phrases (
show)
-
Overlapping Review History: reviewed 1 of 9 top products -
Overrepresented Participation (posted 13 Reviews)
-
Easy Grader (avg. rating: 4.7)
Analysis Details
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
178 reviews
(4.9/5)
(4.9/5)
257 reviews
(4.9/5)
(4.9/5)
629 reviews
(4.9/5)
(4.9/5)
716 reviews
(4.8/5)
(4.8/5)
302 reviews
(4.9/5)
(4.9/5)
238 reviews
(4.6/5)
(4.6/5)
164 reviews
(4.9/5)
(4.9/5)
296 reviews
(4.8/5)
(4.8/5)
364 reviews
(4.1/5)
(4.1/5)
168 reviews
(4.9/5)
(4.9/5)
3,347 of the 12,807 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.8 while reviews without substantial repetitive phrases rated this product an average of 4.5. 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 Deleted Reviews
Deleted Reviews
We discovered a total of 14 deleted Reviews for this product, with an average rating of 4.9. 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.
4.9 average rating of deleted reviews
Warn Rating Trend
Rating Trend
-
- 51%
- Created over 123 days
We counted 12,807 reviews for this product over the span of 1,388 days, an average of 9.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 21 or fewer reviews on any given day.
However, we see the following 123 days exceeding this threshold:In total, we found that 6,559 reviews were created on just 123 days. This is an excessively high number of reviews submitted on these high volume days.
Warn Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
3,826 of the 12,807 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, it does not appear to have a significant impact on the overall rating.
Warn 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 4.4, while the average ease score for reviewers in this category is 4.3. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Warn Word Count Comparison
Word Count Comparison
-
- 56%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 2 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 7,183 reviews (or 56%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
Warn Reviewer Participation
Reviewer Participation
-
- 74%
- From reviewers with an overrepresented participation
We see the following 3 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 9485 reviewers (or 74%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
Unverified Purchases
5,193 of the 12,807 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 Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
5% also reviewed:
I Am Watching You by Teresa Driscoll
4% also reviewed:
My Sister's Grave (Tracy Crosswhite Book 1) by Robert Dugoni
4% also reviewed:
Beneath a Scarlet Sky: A Novel by Mark Sullivan
3% also reviewed:
Say You're Sorry (Morgan Dane Book 1) by Melinda Leigh
3% also reviewed:
Everything We Keep: A Novel by Kerry Lonsdale
3% also reviewed:
A Criminal Defense (Philadelphia Legal) by William L. Myers, Jr.
2% also reviewed:
A Merciful Death (Mercy Kilpatrick Book 1) by Kendra Elliot
2% also reviewed:
The Night Bird (Frost Easton Book 1) by Brian Freeman
Does not include products
from the same brand
from the same brand
2,567 of the 12,807 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 Brand Repeats
Brand Repeats
Brand Repeaters
932 of the 12,807 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
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.
9 of the 12,807 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.