Vitanoria
More product info
From Vitanoria
Refresh the report to view the most up-to-date data available:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Most Trusted Reviews
TRUST
- Verified Purchaser
- Easy Grader (avg. rating: 4.2)
Least Trusted Reviews
TRUST
- Unverified Purchaser
- Never-Verified Reviewer
- Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
- Overlapping Review History: reviewed 1 of 9 top products
- Easy Grader (avg. rating: 4.6)
Analysis Details
We discovered a total of 127 deleted Reviews for this product, with an average rating of 4.7. 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.
24 of the 100 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 2.1 while the verified purchasers have rated this product an average of 1.2. 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.
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.
One-Hit Wonders
19 of the 100 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
15 of the 100 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 1.5 while the reviewers who have written at least one verified purchase review rated this product an average of 1.4. 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.
Take-Back Reviewers
27 of the 100 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 2.0 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 1.2. 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.
Single-Day Reviewers
1 of the 100 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 4.0 while all other reviewers rated this product an average of 1.4. 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.
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- 118%
- 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:In total, we found that 118 reviews (or 118%) are within an overrepresented word count group. These reviews have rated this product an average of 0.0, while all other reviews have rated this product an average of 3.4. 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.
8 of the 100 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 3.1 while reviews without substantial repetitive phrases rated this product an average of 1.3. 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.
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8 of the 100 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 3.0 while the reviewers who have a more unique product review history rated this product an average of 1.3. 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.
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- 70%
- 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:In total, we found that 70 reviewers (or 70%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
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- 0%
- Created over 4 days
However, we see the following 4 days exceeding this threshold:
- 3 Reviews on Jan 23, 2017 (Avg. rating: 4.7)
- 3 Reviews on Nov 23, 2016 (Avg. rating: 4.0)
- 3 Reviews on Nov 21, 2016 (Avg. rating: 3.7)
- 3 Reviews on Jan 20, 2017 (Avg. rating: 3.7)
Read more about our Rating Trend test.
2.9 Product's Average Ease Score
3.9 Category's Average Ease Score
Read more about our Reviewer Ease test.
Brand Repeaters
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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.