Brand Repeaters

• 
• 48%
• Reviewed other products from this brand

171 of the 358 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, it does not appear to have a significant impact on the overall rating.

Brand Loyalists

• 
• 20%
• Reviewed mostly products from this brand

71 of the 358 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.

Brand Monogamists

• 
• 6%
• Reviewed only products from this brand

20 of the 358 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.

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 4.6, while the average ease score for reviewers in this category is 4.2. 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.

• 
• 86%
• 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:

• Reviewers with 1-5 Reviews: 58.4% (Avg. rating: 4.9)
• Reviewers with 6-15 Reviews: 27.4% (Avg. rating: 4.8)

In total, we found that 307 reviewers (or 86%) are within an overrepresented participation group. These reviews have rated this product an average of 4.9, while all other reviews have rated this product an average of 4.7. 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 Reviewer Participation test.

• 
• 53%
• Created over 18 days

We counted 358 reviews for this product over the span of 892 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 18 days exceeding this threshold:

• 37 Reviews on Feb 16, 2015 (Avg. rating: 4.9)
• 21 Reviews on Feb 15, 2015 (Avg. rating: 4.7)
• 15 Reviews on Feb 19, 2015 (Avg. rating: 5.0)
• 14 Reviews on Feb 18, 2015 (Avg. rating: 4.9)
• 13 Reviews on Jun 21, 2015 (Avg. rating: 5.0)
• 12 Reviews on Apr 21, 2015 (Avg. rating: 4.8)
• 11 Reviews on Feb 17, 2015 (Avg. rating: 4.9)
• 10 Reviews on Feb 21, 2015 (Avg. rating: 5.0)
• 8 Reviews on Feb 22, 2015 (Avg. rating: 5.0)
• 6 Reviews on Apr 22, 2015 (Avg. rating: 5.0)
• 6 Reviews on Aug 22, 2015 (Avg. rating: 5.0)
• 6 Reviews on Feb 23, 2015 (Avg. rating: 4.8)
• 6 Reviews on Feb 28, 2015 (Avg. rating: 4.8)
• 6 Reviews on Feb 25, 2015 (Avg. rating: 4.5)
• 5 Reviews on Feb 20, 2015 (Avg. rating: 4.8)
• 5 Reviews on Feb 26, 2015 (Avg. rating: 4.6)
• 5 Reviews on Feb 27, 2015 (Avg. rating: 4.4)
• 5 Reviews on Aug 24, 2015 (Avg. rating: 4.2)
Show All

In total, we found that 191 reviews were created on just 18 days. This is an excessively high number of reviews submitted on these high volume days.

Read more about our Rating Trend test.

One-Hit Wonders

• 
• 16%
• have only posted one review

59 of the 358 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, it does not appear to have a significant impact on the overall rating.

Never-Verified Reviewers

• 
• 22%
• have zero verified purchases

77 of the 358 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

• 
• 5%
• have previously deleted reviews

17 of the 358 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.

Read more about our Suspicious Reviewers test.

• 
• 19%
• Used substantial repetitive phrases

69 of the 358 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.

• 
• 32%
• Unverified Purchases

113 of the 358 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.

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.

• 
• 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.

• 
• 0%
• Substantial overlapping review history

0 of the 358 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.

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

• 
• 1%
• Admitted to receiving an incentive

4 of the 358 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.

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

• 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.