Take-Back Reviewers

• 
• 6%
• have previously deleted reviews

51 of the 853 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 4.1 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 3.7. 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 Suspicious Reviewers test.

• 
• 76%
• 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: 43.6% (Avg. rating: 4.3)
• 6-15 words: 32.2% (Avg. rating: 3.4)

In total, we found that 647 reviews (or 76%) are within an overrepresented word count group. These reviews have rated this product an average of 3.9, while all other reviews have rated this product an average of 3.0. 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 Word Count Comparison test.

• 
• 2%
• Used substantial repetitive phrases

18 of the 853 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.4 while reviews without substantial repetitive phrases rated this product an average of 3.7. 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 Phrase Repetition test.

• 
• 11%
• Substantial overlapping review history

98 of the 853 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 3.6. 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 Overlapping Review History test.

• 13
• Reviews have been deleted

We discovered a total of 13 deleted Reviews for this product, with an average rating of 4.3. 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.

Show distribution of deleted reviews

• 
• 14%
• Created over 18 days

We counted 853 reviews for this product over the span of 957 days, an average of 0.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 5 or fewer reviews on any given day.

However, we see the following 18 days exceeding this threshold:

• 10 Reviews on May 21, 2021 (Avg. rating: 3.3)
• 8 Reviews on May 13, 2021 (Avg. rating: 4.5)
• 7 Reviews on May 20, 2021 (Avg. rating: 3.9)
• 7 Reviews on Sep 22, 2020 (Avg. rating: 3.0)
• 7 Reviews on May 16, 2021 (Avg. rating: 3.0)
• 6 Reviews on Jul 20, 2020 (Avg. rating: 4.7)
• 6 Reviews on Jul 15, 2020 (Avg. rating: 4.2)
• 6 Reviews on Jul 26, 2020 (Avg. rating: 4.0)
• 6 Reviews on Nov 15, 2020 (Avg. rating: 4.0)
• 6 Reviews on Oct 3, 2020 (Avg. rating: 3.8)
• 6 Reviews on Nov 19, 2020 (Avg. rating: 3.5)
• 6 Reviews on Jul 31, 2020 (Avg. rating: 3.3)
• 6 Reviews on Sep 28, 2020 (Avg. rating: 3.3)
• 6 Reviews on May 11, 2021 (Avg. rating: 3.3)
• 6 Reviews on May 22, 2021 (Avg. rating: 3.2)
• 6 Reviews on Jul 7, 2020 (Avg. rating: 2.8)
• 6 Reviews on May 14, 2021 (Avg. rating: 2.5)
• 6 Reviews on Aug 26, 2020 (Avg. rating: 2.3)
Show All

In total, we found that 117 reviews were created on just 18 days. Although any days with a larger number of reviews than expected is suspicious, these reviews do not appear to have a significant impact on the overall rating.

Read more about our Rating Trend test.

• 
• 88%
• 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: 46.7% (Avg. rating: 3.4)
• Reviewers with 6-15 Reviews: 41.4% (Avg. rating: 3.9)

In total, we found that 751 reviewers (or 88%) 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.

• 
• 2%
• Unverified Purchases

20 of the 853 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.

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

Brand Repeaters

• 
• 2%
• Reviewed other products from this brand

20 of the 853 reviewers have reviewed other products for this brand. 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 Brand Repeats test.

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

• 
• 0%
• Admitted to receiving an incentive

We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.