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The World That We Knew: A Novel
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From Hoffman, Alice
This report was last updated 4/1/2020.
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Pass Overall Grade
WARN Deleted Reviews
WARN Rating Trend
WARN Suspicious Reviewers
WARN Phrase Repetition
WARN Reviewer Participation
PASS Unverified Purchases
PASS Word Count Comparison
PASS Overlapping Review History
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
What a wonderful book. I'm still thinking about it hours ... [Go to full review]
Sep 25, 2019
100%
TRUST
TRUST
- Unverified Purchaser
- Brand Repeater (3 of 84 reviews for this brand; avg rating: 4.3)
- Overlapping Review History: reviewed 3 of 9 top products
- Easy Grader (avg. rating: 4.4)
Least Trusted Reviews
This new book by Alice Hoffman is fantastic. I thought ... [Go to full review]
Sep 24, 2019
29%
TRUST
TRUST
- Unverified Purchaser
- Created on a high volume day
- Admitted to receiving an incentive
- Contains repetitive phrases (show)
- Take-Back Reviewer (3 deleted Reviews; avg. rating: 4.7)
- Overlapping Review History: reviewed 1 of 9 top products
- Overrepresented Participation (posted 83 Reviews)
- Easy Grader (avg. rating: 4.7)
Analysis Details
Warn Deleted Reviews
We discovered a total of 1 deleted Review for this product, with an average rating of 1. 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.
Warn Rating Trend
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- 11%
- Created over 2 days
We counted 249 reviews for this product over the span of 189 days, an average of 1.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 6 or fewer reviews on any given day.
However, we see the following 2 days exceeding this threshold:In total, we found that 27 reviews were created on just 2 days. Although any days with a larger number of reviews than expected is suspicious, the discrepancy in ratings from reviews created on these high volume days and reviews created on other days isn't significant enough to rule out the possibility of it being due to random chance.
Warn Suspicious Reviewers
Take-Back Reviewers
71 of the 249 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 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
5 reviews
(4.6/5)
(4.6/5)
2 reviews
(5.0/5)
(5.0/5)
16 reviews
(4.7/5)
(4.7/5)
7 reviews
(4.7/5)
(4.7/5)
9 reviews
(4.6/5)
(4.6/5)
2 reviews
(4.0/5)
(4.0/5)
2 reviews
(5.0/5)
(5.0/5)
9 reviews
(4.8/5)
(4.8/5)
8 reviews
(4.6/5)
(4.6/5)
2 reviews
(5.0/5)
(5.0/5)
81 of the 249 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.
Warn Reviewer Participation
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- 31%
- From reviewers with an overrepresented participation
We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 78 reviewers (or 31%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, the discrepancy in ratings between reviewers in an overrepresented participation groups and all other reviewers isn’t significant enough to rule out the possibility of it being due to random chance.
Pass Unverified Purchases
109 of the 249 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
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- 0%
- 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
Reviewers of this product have ALSO reviewed the following products:
15% also reviewed:
Where The Crawdads Sing by Owens, Delia
10% also reviewed:
JchanMing Privacy Screen Protectors for iPhone... by
10% also reviewed:
All the Light We Cannot See: A Novel by Anthony Doerr
8% also reviewed:
Cilka's Journey: A Novel (Tattooist of... by Heather Morris
8% also reviewed:
Before We Were Yours: A Novel by Lisa Wingate
8% also reviewed:
Little Fires Everywhere: A Novel by Celeste Ng
8% also reviewed:
Lilac Girls: A Novel by Martha Hall Kelly
8% also reviewed:
Educated by Tara Westover
8% also reviewed:
The Tattooist of Auschwitz: A Novel by Heather Morris
98 of the 249 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
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 4.2. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.3 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
3 of the 249 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
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
10 of the 249 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.