Take-Back Reviewers

• 
• 4%
• have previously deleted reviews

38 of the 956 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.6 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 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.

Read more about our Suspicious Reviewers 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 4.4, 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.

• 
• 7%
• Used substantial repetitive phrases

65 of the 956 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.7 while reviews without substantial repetitive phrases rated this product an average of 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.

Read more about our Phrase Repetition test.

• 
• 20%
• Created over 19 days

We counted 956 reviews for this product over the span of 845 days, an average of 1.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 6 or fewer reviews on any given day.

However, we see the following 19 days exceeding this threshold:

• 32 Reviews on Feb 20, 2015 (Avg. rating: 4.6)
• 15 Reviews on Feb 28, 2015 (Avg. rating: 4.3)
• 14 Reviews on Jan 20, 2015 (Avg. rating: 4.8)
• 11 Reviews on Jan 24, 2015 (Avg. rating: 4.6)
• 10 Reviews on Jan 31, 2015 (Avg. rating: 4.3)
• 9 Reviews on Feb 8, 2015 (Avg. rating: 4.9)
• 9 Reviews on Jan 26, 2015 (Avg. rating: 4.8)
• 9 Reviews on Feb 23, 2015 (Avg. rating: 4.3)
• 9 Reviews on Mar 10, 2015 (Avg. rating: 4.0)
• 8 Reviews on Mar 12, 2015 (Avg. rating: 4.6)
• 8 Reviews on Mar 26, 2015 (Avg. rating: 4.6)
• 8 Reviews on Mar 20, 2015 (Avg. rating: 4.5)
• 8 Reviews on Feb 24, 2015 (Avg. rating: 4.3)
• 8 Reviews on Mar 1, 2015 (Avg. rating: 4.1)
• 8 Reviews on Mar 18, 2015 (Avg. rating: 4.1)
• 8 Reviews on Feb 4, 2016 (Avg. rating: 4.0)
• 7 Reviews on Mar 2, 2015 (Avg. rating: 3.9)
• 7 Reviews on Apr 10, 2015 (Avg. rating: 3.9)
• 7 Reviews on Mar 11, 2015 (Avg. rating: 3.1)
Show All

In total, we found that 195 reviews were created on just 19 days. This is an excessively high number of reviews submitted on these high volume days.

Read more about our Rating Trend test.

• 
• 56%
• Unverified Purchases

531 of the 956 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.

Brand Loyalists

• 
• 3%
• Reviewed mostly products from this brand

25 of the 956 reviewers have reviewed multiple products but half or more of their reviews are for this brand. While this is more Brand Loyalists than we'd expect to see, the discrepancy in ratings between the Brand Loyalists and non-loyalists isn't significant enough to rule out the possibility of it being due to random chance.

Read more about our Brand Repeats test.

• 
• 45%
• 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:

• 0-5 words: 19.6% (Avg. rating: 4.3)
• 16-25 words: 25.1% (Avg. rating: 4.3)

In total, we found that 427 reviews (or 45%) are within an overrepresented word count group. While this is more reviews from overrepresented word count groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.

Read more about our Word Count Comparison test.

• 
• 69%
• 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 6-15 Reviews: 68.6% (Avg. rating: 4.4)

In total, we found that 656 reviewers (or 69%) 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.

• 
• 23%
• Substantial overlapping review history

220 of the 956 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

6 of the 956 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.