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Fail Unnatural reviews detected

Original:

8,031 Reviews

Adjusted:

1,648 Reviews

Rank in: Uncategorized
100%
42%

View/Edit Adjustment
How is this calculated?
Report Last Updated: Jan 31, 2019
Show Report History
Update Available

Report Card

Click a test to jump to details

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

Most Trusted Reviews

Soluzione comoda ma, dopo il primo mese di fruizione ha ... [Go to full review]
Nov 24, 2018      
100% TRUST
  • Verified Purchaser
  • Brand Repeater (2 of 8 reviews for this brand; avg rating: 3.0)
  • Critical Reviewer (avg. rating: 3.5)


Least Trusted Reviews

Ottima... Per me la migliore di tutte [Go to full review]
Jan 13, 2019      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (7 words)
  • Contains repetitive phrases (show)
  • One-Hit Wonder
  • Overrepresented Participation (posted 1 review)
  • Easy Grader (avg. rating: 5.0)


Analysis Details


Fail Suspicious Reviewers

One-Hit Wonders


3,993 of the 8,031 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.

from one-hit wonders

from reviewers with more than one review


4.5
4.5


Take-Back Reviewers


104 of the 8,031 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.

from take-back reviewers

from reviewers without previously deleted reviews


4.5
4.5


Single-Day Reviewers


253 of the 8,031 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 4.8 while all other reviewers 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.

from single-day reviewers

from non-single-day reviewers


4.8
4.5


Read more about our Suspicious Reviewers 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 4.5, 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.

4.5 Product's Average Ease Score

4.3 Category's Average Ease Score


4.5
4.3


Read more about our Reviewer Ease test.


Fail Word Count Comparison

  • 12%
  • 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 939 reviews (or 12%) are within an overrepresented word count group. These reviews have rated this product an average of 4.8, while all other reviews have 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.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.8
4.5


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:
432 reviews
(4.4/5)
192 reviews
(4.9/5)
336 reviews
(4.5/5)
186 reviews
(4.5/5)
231 reviews
(4.7/5)
87 reviews
(4.9/5)
84 reviews
(4.6/5)
248 reviews
(4.3/5)
281 reviews
(4.7/5)
214 reviews
(4.7/5)
Show MoreShow Less
Common Phrases in Titles:
98 reviews
(4.7/5)
168 reviews
(4.9/5)
192 reviews
(4.6/5)
439 reviews
(4.9/5)
288 reviews
(4.8/5)
Show MoreShow Less


1,786 of the 8,031 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 4.5. 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.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.8
4.5


Read more about our Phrase Repetition test.

Warn Deleted Reviews

We discovered a total of 33 deleted reviews for this product, with an average rating of 4.1. 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:
  1. 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.
  2. We have no information on reviews that were never published in the first place.
  3. 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.
Read more about the Deleted Reviews test here.

4.1 average rating of deleted reviews

4.1


Show distribution of deleted reviews

Warn Rating Trend

  • 39%
  • Created over 63 days

We counted 8,031 reviews for this product over the span of 443 days, an average of 18.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 34 or fewer reviews on any given day.

However, we see the following 63 days exceeding this threshold:In total, we found that 3,164 reviews were created on just 63 days. This is an excessively high number of reviews submitted on these high volume days.

from reviews created on high volume days

from reviews created on normal volume days


4.6
4.5


Read more about our Rating Trend test.

Warn Reviewer Participation

  • 85%
  • 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 6864 reviewers (or 85%) 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


4.5
4.5


Read more about our Reviewer Participation test.

Pass Unverified Purchases

396 of the 8,031 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


4.0
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:

Does not include products
from the same brand


799 of the 8,031 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


4.6
4.5


Read more about our Overlapping Review History test.

Pass Brand Repeats

Brand Repeaters


231 of the 8,031 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


4.5
4.5


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.

  • 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.


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