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Deluxe Minivibrator Vibroprinz, kleiner und wasserfester Bullet Vibrator mit 10...
More product info From Lumunu

39% of potentially unnatural reviews removed (why?)
Adjusted:
Jump to Report Card


Report Card

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

Most Trusted Reviews

Für unterwegs und im Auto super, aber nach ein paar ... [Go to full review]
Dec 31, 1969      
100% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (2 deleted Reviews; avg. rating: 4.0)
  • Critical Reviewer (avg. rating: 4.1)


Least Trusted Reviews

Wie gewohnt wurde der kleine Vibroprinz in einer unauffälligen Verpackung ... [Go to full review]
Feb 12, 2017      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Admitted to receiving an incentive
  • Contains repetitive phrases (show)
  • Take-Back Reviewer (3 deleted Reviews; avg. rating: 4.7)
  • Brand Loyalist (21 of 27 reviews for this brand; avg rating: 4.6)
  • Overlapping Review History: reviewed 2 of 9 top products
  • Easy Grader (avg. rating: 4.5)


Analysis Details

Fail Deleted Reviews

We discovered a total of 42 deleted Reviews for this product, with an average rating of 4.5. 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 our Deleted Reviews test.

4.5 average rating of deleted reviews

4.5


Show distribution of deleted reviews

Fail Brand Repeats

Brand Repeaters


Approximately 45% of reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, the discrepancy in ratings between the Brand Repeaters and non-repeaters isn't significant enough to rule out the possibility of it being due to random chance.

from Brand Repeaters

from Non-Repeaters


4.7
2.8


Brand Loyalists


Approximately 25% of reviewers have reviewed multiple products but half or more of their reviews are for this brand. This is an excessively large percentage of Brand Loyalists which may indicate unnatural reviews.

from Brand Loyalists

from Non-Loyalists


4.8
3.4


Brand Monogamists


Less than approximately 10% of reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.

from Brand Monogamists

from Non-Monogamists


5.0
3.7


Read more about our Brand Repeats test.

Fail Word Count Comparison

  • ~25%
  • 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 approximately 25% are within an overrepresented word count group. These reviews have rated this product an average of 2.9, while all other reviews have rated this product an average of 4.0. 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


2.9
4.0


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:
~4% of reviews
(5.0/5)
~4% of reviews
(5.0/5)
~6% of reviews
(4.3/5)
~4% of reviews
(4.0/5)
~6% of reviews
(4.7/5)
~4% of reviews
(5.0/5)
~4% of reviews
(5.0/5)
~4% of reviews
(5.0/5)
~4% of reviews
(4.5/5)
~4% of reviews
(4.0/5)
Show MoreShow Less
Common Phrases in Titles:
~13% of reviews
(4.7/5)
~4% of reviews
(5.0/5)
~4% of reviews
(4.5/5)
~4% of reviews
(1.0/5)
~4% of reviews
(5.0/5)
Show MoreShow Less


Approximately 40% of reviews use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.2 while reviews without substantial repetitive phrases rated this product an average of 3.4. 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.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.2
3.4


Read more about our Phrase Repetition test.

Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

Does not include products
from the same brand


Approximately 20% of reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.3 while the reviewers who have a more unique product review history rated this product an average of 3.5. 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 reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.3
3.5


Read more about our Overlapping Review History test.

Warn Rating Trend
It appears that several reviews were created during just a short period of time.
Read more about our Rating Trend test.

Warn Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.


Less than approximately 10% of reviews admitted to receiving a free or discounted product in exchange for a review. While we could not find a statistically significant difference between the average rating of incentivized reviews and non-incentivized reviews, the presences of at least one incentivized review indicates that there may be more, since not all reviewers will disclose that they had received an incentive to post a review.

from incentivized reviews

from non-incentivized reviews


4.5
3.6


Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.

Warn Suspicious Reviewers

Take-Back Reviewers


Approximately 40% 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


4.0
3.5


Read more about our Suspicious Reviewers test.

Pass Unverified Purchases

4 of the 504 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


N/A
3.7


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 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 3.6, while the average ease score for reviewers in this category is 4.1.

3.6 Product's Average Ease Score

4.1 Category's Average Ease Score


3.6
4.1


Read more about our Reviewer Ease test.


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


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