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Warn Unnatural reviews possible

Original:

357 Reviews

Adjusted:

207 Reviews

Rank in: Kindle Store
56%
66%

View/Edit Adjustment
How is this calculated
Report Last Updated: Sep 30, 2017
Update Available
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Report Card

Click a test to jump to details

FAIL Rating Trend
FAIL Phrase Repetition
WARN Unverified Purchases
WARN Suspicious Reviewers
WARN Reviewer Participation
PASS Word Count Comparison
PASS Overlapping Review History
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews
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Most Trusted Reviews

1/5
Nothing much good to say about it very poor. [Go to full review]
Oct 13, 2015      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 2.9)


Least Trusted Reviews

Straightforward news. Easy to navigate massive amount of content. Writers ... [Go to full review]
Dec 16, 2013      
0% TRUST
  • Unverified Purchaser
  • Contains repetitive phrases (show)
  • One-Hit Wonder
  • Never-Verified Reviewer
  • Overrepresented Participation (posted 1 review)
  • Critical Reviewer (avg. rating: 4.0)


Analysis Details


Fail Rating Trend

  • 1%
  • Created over 1 day

We counted 357 reviews for this product over the span of 2,104 days, an average of 0.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.

However, we see the following 1 day exceeding this threshold:In total, we found that 5 reviews were created on just 1 day. The reviews on these high volume days have rated this product an average of 5.0 while reviews from other days have rated this product an average of 3.8. 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.

from reviews created on high volume days

from reviews created on normal volume days


5.0
3.8


Read more about our Rating Trend test.

Fail 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:
38 reviews
(10.6%)
24 reviews
(6.7%)
14 reviews
(3.9%)
17 reviews
(4.8%)
11 reviews
(3.1%)
9 reviews
(2.5%)
12 reviews
(3.4%)
11 reviews
(3.1%)
Show MoreShow Less
Common Phrases in Titles:
6 reviews
(1.7%)
6 reviews
(1.7%)
4 reviews
(1.1%)


24 of the 357 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.3 while reviews without substantial repetitive phrases rated this product an average of 3.8. 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.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.3
3.8


Read more about our Phrase Repetition test.

Warn Unverified Purchases

214 of the 357 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.

from unverified purchasers

from verified purchases


3.6
4.1


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

One-Hit Wonders


37 of the 357 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.

from one-hit wonders

from reviewers with more than one review


3.9
3.8


Never-Verified Reviewers


101 of the 357 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from never-verified reviewers

from reviewers with at least one verified purchase review


3.7
3.8


Take-Back Reviewers


2 of the 357 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, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.

from take-back reviewers

from reviewers without previously deleted reviews


4.0
3.8


Read more about our Suspicious Reviewers test.

Warn Reviewer Participation

  • 55%
  • 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 196 reviewers (or 55%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


3.8
3.8


Read more about our Reviewer Participation test.

Pass Word Count Comparison

  • 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.

Pass Overlapping Review History

2% also reviewed:
Amazon Video by Amazon.com

2% also reviewed:
Fire TV Stick by Amazon

1% also reviewed:
The Goldfinch by Donna Tartt

Does not include products
from the same brand


49 of the 357 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.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


3.9
3.8


Read more about our Overlapping Review History test.

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, while the average ease score for reviewers in this category is 4.

4.0 Product's Average Ease Score

4.0 Category's Average Ease Score


4.0
4.0


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.

  • 0%
  • 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, or 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.
Read more about our Deleted Reviews test.


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