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From Michael Kupperman
This report was last updated 5/15/2020.
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Report Card
Pass Overall Grade
WARN Rating Trend
WARN Unverified Purchases
WARN Suspicious Reviewers
WARN Word Count Comparison
WARN Phrase Repetition
WARN Reviewer Participation
PASS Overlapping Review History
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews
Most Trusted Reviews
I’m a huge fan. He should be more famous [Go to full review]
Oct 22, 2018
100%
TRUST
TRUST
- Verified Purchaser
- Take-Back Reviewer (1 deleted Review; avg. rating: 1.0)
- Critical Reviewer (avg. rating: 2.8)
Least Trusted Reviews
... Michael Kupperman asks his father Joel, a former Quiz ... [Go to full review]
Aug 8, 2018
0%
TRUST
TRUST
- Unverified Purchaser
- Created on a high volume day
- Overrepresented word count (183 words)
- Contains repetitive phrases (show)
- Take-Back Reviewer (1 deleted Review; avg. rating: 4.0)
- Overrepresented Participation (posted 7 Reviews)
- Critical Reviewer (avg. rating: 3.4)
Analysis Details
Warn Rating Trend
-
- 27%
- Created over 4 days
We counted 51 reviews for this product over the span of 495 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.
However, we see the following 4 days exceeding this threshold:In total, we found that 14 reviews were created on just 4 days. This is an excessively high number of reviews submitted on these high volume days.
Warn Unverified Purchases
27 of the 51 total reviews for this product are unverified purchases. While this is a higher percentage of unverified purchases than we'd expect to see, it does not appear to have a significant impact on the overall rating.
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.
Warn Suspicious Reviewers
Take-Back Reviewers
17 of the 51 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 Word Count Comparison
-
- 37%
- 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 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 19 reviews (or 37%) are within an overrepresented word count group. While this is more reviews from overrepresented word count groups than we'd expect to see, these reviews do 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
7 reviews
(5.0/5)
(5.0/5)
3 reviews
(4.7/5)
(4.7/5)
3 reviews
(5.0/5)
(5.0/5)
3 reviews
(4.0/5)
(4.0/5)
6 reviews
(4.5/5)
(4.5/5)
2 reviews
(4.5/5)
(4.5/5)
2 reviews
(5.0/5)
(5.0/5)
3 reviews
(5.0/5)
(5.0/5)
3 reviews
(4.7/5)
(4.7/5)
3 reviews
(4.3/5)
(4.3/5)
Common Phrases in Titles:
5 reviews
(4.8/5)
(4.8/5)
3 reviews
(5.0/5)
(5.0/5)
2 reviews
(5.0/5)
(5.0/5)
26 of the 51 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
-
- 39%
- 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 20 reviewers (or 39%) 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 Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
8% also reviewed:
Anonymous Girl by Greer Hendricks
8% also reviewed:
Daisy Jones & The Six: A Novel by Taylor Jenkins Reid
6% also reviewed:
Hillbilly Elegy: A Memoir of a Family and Culture... by J. D. Vance
6% also reviewed:
History of Wolves: A Novel by Emily Fridlund
6% also reviewed:
The Wife Between Us: A Novel by Greer Hendricks
6% also reviewed:
The Whisper Man: A Novel by Alex North
6% also reviewed:
The Family Upstairs: A Novel by Lisa Jewell
6% also reviewed:
My Name Is Lucy Barton: A Novel by Elizabeth Strout
6% also reviewed:
The Breakdown: A Novel by B. A. Paris
6 of the 51 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 4.1, while the average ease score for reviewers in this category is 4.3.
4.1 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
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.
2 of the 51 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.
Pass 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.