• 
• 55%
• Created over 3 days

We counted 29 reviews for this product over the span of 285 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.

However, we see the following 3 days exceeding this threshold:

• 8 Reviews on Mar 9, 2017 (Avg. rating: 9.1)
• 4 Reviews on Jul 19, 2016 (Avg. rating: 9.8)
• 4 Reviews on Sep 27, 2016 (Avg. rating: 9.3)

In total, we found that 16 reviews were created on just 3 days. The reviews on these high volume days have rated this product an average of 9.3 while reviews from other days have rated this product an average of 6.0. 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.

Read more about our Rating Trend test.

• 
• 83%
• Unverified Purchases

24 of the 29 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 8.5 while the verified purchasers have rated this product an average of 4.4. 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.

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.

Brand Monogamists

• 
• 3%
• Reviewed only products from this brand

1 of the 29 reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.

Read more about our Brand Repeats test.

One-Hit Wonders

• 
• 59%
• have only posted one review

17 of the 29 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.

Never-Verified Reviewers

• 
• 52%
• have zero verified purchases

15 of the 29 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.

Take-Back Reviewers

• 
• 10%
• have previously deleted reviews

3 of the 29 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.

Read more about our Suspicious Reviewers test.

• 
• 7%
• Mentioned the word "Sample"

2 of the 29 total reviews for this product mentioned the word "sample" within their review. While we could not find a statistically significant difference between the average rating of reviews that mentioned the word "sample" and those that did not, 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.

Read more about our Sample Reviews test.

• 
• 10%
• Used substantial repetitive phrases

3 of the 29 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

Read more about our Phrase Repetition test.

• 
• 83%
• 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:

• Reviewers with 1-5 Reviews: 82.8% (Avg. rating: 7.8)

In total, we found that 24 reviewers (or 83%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.

Read more about our Reviewer Participation test.

• 
• 0%
• Have an overrepresented word count

We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.

• 
• 21%
• Substantial overlapping review history

6 of the 29 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.

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.

• 0
• Reviews have been deleted

We have not discovered any deleted reviews for this product.

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.