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Fail Overall Grade
FAIL Deleted Reviews
FAIL Rating Trend
FAIL Brand Repeats
FAIL Suspicious Reviewers
FAIL Phrase Repetition
WARN Unverified Purchases
WARN Sample Reviews
WARN Reviewer Participation
PASS Word Count Comparison
PASS Overlapping Review History
PASS Reviewer Ease
Most Trusted Reviews
This stuff is potent lol. This can make you a ... [Go to full review]
Nov 5, 2016
- Verified Purchaser
- Single-Day Reviewer (posted all reviews on Nov 5, 2016)
- Overlapping Review History: reviewed 1 of 9 top products
- Critical Reviewer (avg. rating: 7.7)
Least Trusted Reviews
let me just start off by saying that i received ... [Go to full review]
Mar 3, 2012
- Unverified Purchaser
- Created on a high volume day
- Overrepresented word count (190 words)
- Contains repetitive phrases (show)
- Never-Verified Reviewer
- Take-Back Reviewer (1 deleted review; avg. rating: 9.0)
- Brand Loyalist (5 of 9 reviews for this brand; avg rating: 9.6)
- Overlapping Review History: reviewed 1 of 9 top products
- Easy Grader (avg. rating: 9.6)
Fail Deleted Reviews
We discovered a total of 56 deleted reviews for this product, with an average rating of 7.6. 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:
- 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.
- We have no information on reviews that were never published in the first place.
- 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.
7.6 average rating of deleted reviews
Show distribution of deleted reviews
Fail Rating Trend
- Created over 19 days
We counted 732 reviews for this product over the span of 1,916 days, an average of 0.4 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 4 or fewer reviews on any given day.
However, we see the following 19 days exceeding this threshold:
Fail Brand Repeats
237 of the 732 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.
126 of the 732 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.
54 of the 732 reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.
Fail Suspicious Reviewers
262 of the 732 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.
385 of the 732 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.
131 of the 732 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.
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:
Show MoreShow Less
25 of the 732 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 9.2 while reviews without substantial repetitive phrases rated this product an average of 8.4. 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.
Warn Unverified Purchases
542 of the 732 total reviews for this product are unverified purchases. While this is a higher percentage of unverified purchases than we'd expect to see, the discrepancy in ratings between the unverified purchases and verified purchases isn't significant enough to rule out the possibility of it being due to random chance.
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 Sample Reviews
44 of the 732 total reviews for this product mentioned the word "sample" within their review. This is more than we would expect see; the presences of any reviews that mention the word "sample" indicates that there may be more, since not all reviewers will disclose that they used a sample within their review.
Warn Reviewer Participation
- 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:
Pass Word Count Comparison
- 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:
Pass Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
209 of the 732 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.
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 8.5, while the average ease score for reviewers in this category is 8.8.
8.5 Product's Average Ease Score
8.8 Category's Average Ease Score
Read more about our Reviewer Ease test.