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Vansky® 51 LEDs Blacklight Flashlight Pet UV Urine Stain Detector Dog/Cat Stain Remover,Find Dry... From Vansky Report Feedback

Fail Unnatural reviews detected

Original:

1,513 Reviews

Adjusted:

687 Reviews

Rank in: Light Bulbs
92%
84%

View/Edit Adjustment
How is this calculated
Report Last Updated: Apr 16, 2018
Update Available
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Report Card

Click a test to jump to details

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

I have a cat who loves to urinate on our ... [Go to full review]
Apr 24, 2017      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 4.1)


Least Trusted Reviews

Exactly as advertised. Easy to handle black light. [Go to full review]
Jul 25, 2017      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (8 words)
  • Contains repetitive phrases (show)
  • Single-Day Reviewer (posted all reviews on Jul 25, 2017)
  • Overrepresented Participation (posted 2 reviews)
  • Easy Grader (avg. rating: 5.0)


Analysis Details


Fail Rating Trend

  • 10%
  • Created over 14 days

We counted 1,513 reviews for this product over the span of 787 days, an average of 1.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 8 or fewer reviews on any given day.

However, we see the following 14 days exceeding this threshold:In total, we found that 150 reviews were created on just 14 days. The reviews on these high volume days have rated this product an average of 4.8 while reviews from other days have rated this product an average of 4.6. 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


4.8
4.6


Read more about our Rating Trend test.

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

4.4 Product's Average Ease Score

4.3 Category's Average Ease Score


4.4
4.3


Read more about our Reviewer Ease test.


Fail Word Count Comparison

  • 29%
  • 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 434 reviews (or 29%) are within an overrepresented word count group. These reviews have rated this product an average of 4.7, while all other reviews have rated this product an average of 4.6. 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 an overrepresented word count

from reviews with a properly represented word count


4.7
4.6


Read more about our Word Count Comparison 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:
25 reviews
Common Phrases in Titles:
52 reviews


49 of the 1,513 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.9 while reviews without substantial repetitive phrases rated this product an average of 4.6. 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


4.9
4.6


Read more about our Phrase Repetition test.

Warn Deleted Reviews

We discovered a total of 37 deleted reviews for this product, with an average rating of 4.8. 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.

4.8 average rating of deleted reviews

4.8



Read more about our Deleted Reviews test.

Warn Suspicious Reviewers

Take-Back Reviewers


90 of the 1,513 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


4.7
4.6


Read more about our Suspicious Reviewers test.

Warn Reviewer Participation

  • 71%
  • 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 1076 reviewers (or 71%) 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


4.6
4.7


Read more about our Reviewer Participation test.

Pass Unverified Purchases

48 of the 1,513 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


4.7
4.6


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
Reviewers of this product have ALSO reviewed the following products:



54 of the 1,513 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


4.7
4.6


Read more about our Overlapping Review History test.

Pass Brand Repeats

Brand Repeaters


5 of the 1,513 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.

from Brand Repeaters

from Non-Repeaters


5.0
4.6


Read more about our Brand Repeats 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.


2 of the 1,513 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.

from incentivized reviews

from non-incentivized reviews


5.0
4.6


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.