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Fail Unnatural reviews likely*

Original:

254 Reviews

Adjusted:

62 Reviews

Rank in: Uncategorized
21%
4%

How is this calculated
Report Last Updated: May 29, 2018
Update Available

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Report Card

Click a test to jump to details

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

Leider gar nicht geholfen. Nehme sie nun schon seit zwei ... [Go to full review]
Mar 16, 2017      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 3.0)


Least Trusted Reviews

Dieses Produkt war eine Empfehlung meiner Schwiegermutter, die nach fast ... [Go to full review]
Feb 15, 2017      
0% TRUST
  • Unverified Purchaser
  • Overrepresented word count (86 words)
  • Contains repetitive phrases (show)
  • Never-Verified Reviewer
  • Single-Day Reviewer (posted all reviews on Feb 15, 2017)
  • Overrepresented Participation (posted 4 reviews)
  • Easy Grader (avg. rating: 4.5)


Analysis Details


Fail 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 4.7, while the average ease score for reviewers in this category is 4.2. 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.

4.7 Product's Average Ease Score

4.2 Category's Average Ease Score


4.7
4.2


Read more about our Reviewer Ease 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:
~15% of reviews
~7% of reviews
~10% of reviews
~12% of reviews
~7% of reviews
Show MoreShow Less


Approximately 45% of reviews use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.7 while reviews without substantial repetitive phrases rated this product an average of 3.9. 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


4.7
3.9


Read more about our Phrase Repetition test.

Warn Brand Repeats

Brand Loyalists


Less than approximately 10% of reviewers have reviewed multiple products but half or more of their reviews are for this brand. While this is more Brand Loyalists than we'd expect to see, the discrepancy in ratings between the Brand Loyalists and non-loyalists isn't significant enough to rule out the possibility of it being due to random chance.

from Brand Loyalists

from Non-Loyalists


5.0
4.3


Read more about our Brand Repeats test.

Warn Suspicious Reviewers

Never-Verified Reviewers


Approximately 25% of reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, the discrepancy in ratings between the Never-Verified Reviewers and reviewers who have written at least one verified purchase review isn't significant enough to rule out the possibility of it being due to random chance.

from never-verified reviewers

from reviewers with at least one verified purchase review


4.6
4.2


Take-Back Reviewers


Less than approximately 10% of 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


4.5
4.3


Read more about our Suspicious Reviewers test.

Warn Word Count Comparison

  • ~45%
  • 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 approximately 45% 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.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.2
4.4


Read more about our Word Count Comparison test.

Pass Rating Trend
We didn't notice any signals that would indicate reviews were created unevenly over time.
Read more about our Rating Trend test.

Pass Unverified Purchases

97 of the 254 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.

from unverified purchasers

from verified purchases


4.6
4.2


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
  • <10%
  • Substantial overlapping review history
Less than approximately 10% of 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.
Read more about our Overlapping Review History test.

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%
  • 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.

N/A Reviewer Participation
We haven't collected sufficient data to run this test yet. See more


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