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From Teresa Driscoll
This report was last updated 5/14/2021.
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 26,643 Ratings, we counted 12,144 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".
Top products in Mystery with authentic reviews:
Report Card
Warn Overall Grade
FAIL 
Incentivized Reviews
Incentivized ReviewsFAIL Word Count Comparison
Word Count ComparisonFAIL Phrase Repetition
Phrase RepetitionWARN Deleted Reviews
Deleted ReviewsWARN Rating Trend
Rating TrendWARN Suspicious Reviewers
Suspicious ReviewersWARN Reviewer Participation
Reviewer ParticipationPASS Unverified Purchases
Unverified PurchasesPASS Overlapping Review History
Overlapping Review HistoryPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand Repeats
Most Trusted Reviews
Good book keep you interested throughout. [Go to full review]
Sep 13, 2017
59%
TRUST
TRUST
-
Verified Purchaser -
Created on a high volume day
-
Take-Back Reviewer (1 deleted Review; avg. rating: 5.0) -
Overlapping Review History: reviewed 3 of 9 top products -
Critical Reviewer (avg. rating: 4.2)
Least Trusted Reviews
Wow!! Great read! Started around midnight and read it till ... [Go to full review]
Sep 7, 2017
0%
TRUST
TRUST
-
Verified Purchaser
-
Created on a high volume day
-
Overrepresented word count (28 words) -
Contains repetitive phrases (
show)
-
Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
-
Overrepresented Participation (posted 10 Reviews) -
Critical Reviewer (avg. rating: 4.2)
Analysis Details
Fail 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 12,144 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. Incentivized reviews have rated this product an average of 3.8 while reviews that were not incentivized 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.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Fail Word Count Comparison
Word Count Comparison
-
- 60%
- 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 7,280 reviews (or 60%) are within an overrepresented word count group. These reviews have rated this product an average of 4.6, while all other reviews have rated this product an average of 4.3. 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
379 reviews
(4.8/5)
(4.8/5)
193 reviews
(4.9/5)
(4.9/5)
813 reviews
(4.7/5)
(4.7/5)
449 reviews
(4.7/5)
(4.7/5)
280 reviews
(4.8/5)
(4.8/5)
180 reviews
(4.9/5)
(4.9/5)
230 reviews
(4.7/5)
(4.7/5)
222 reviews
(4.9/5)
(4.9/5)
483 reviews
(4.7/5)
(4.7/5)
179 reviews
(4.8/5)
(4.8/5)
Common Phrases in Titles:
148 reviews
(4.9/5)
(4.9/5)
381 reviews
(4.8/5)
(4.8/5)
338 reviews
(4.9/5)
(4.9/5)
2,301 of the 12,144 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 4.4. 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 111 deleted Reviews for this product, with an average rating of 4.6. 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.
4.6 average rating of deleted reviews
Warn Rating Trend
Rating Trend
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- 51%
- Created over 189 days
We counted 12,144 reviews for this product over the span of 1,350 days, an average of 9.0 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 20 or fewer reviews on any given day.
However, we see the following 189 days exceeding this threshold:In total, we found that 6,156 reviews were created on just 189 days. This is an excessively high number of reviews submitted on these high volume days.
Warn Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
3,263 of the 12,144 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 Participation
Reviewer Participation
-
- 61%
- 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 7459 reviewers (or 61%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
Unverified Purchases
5,965 of the 12,144 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:
Stillhouse Lake by Rachel Caine
4% also reviewed:
Beneath a Scarlet Sky: A Novel by Mark Sullivan
3% also reviewed:
My Sister's Grave (Tracy Crosswhite Book 1) by Robert Dugoni
3% also reviewed:
Say You're Sorry (Morgan Dane Book 1) by Melinda Leigh
2% also reviewed:
Everything We Keep: A Novel by Kerry Lonsdale
2% also reviewed:
The Storyteller's Secret: A Novel by Sejal Badani
2% also reviewed:
A Criminal Defense (Philadelphia Legal) by William L. Myers, Jr.
2% also reviewed:
If You Tell: A True Story of Murder, Family... by Gregg Olsen
Does not include products
from the same brand
from the same brand
2,332 of the 12,144 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 4.4, 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.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
262 of the 12,144 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.
