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This report was last updated 7/10/2020.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Card
Pass Overall Grade
FAIL 
Unverified Purchases
Unverified PurchasesFAIL Suspicious Reviewers
Suspicious ReviewersFAIL Overlapping Review History
Overlapping Review HistoryWARN Rating Trend
Rating TrendWARN Word Count Comparison
Word Count ComparisonWARN Reviewer Participation
Reviewer ParticipationPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Deleted Reviews
Deleted ReviewsN/A Phrase Repetition
Phrase RepetitionN/A Incentivized Reviews
Incentivized Reviews
Most Trusted Reviews
Color quality... [Go to full review]
Mar 6, 2020
100%
TRUST
TRUST
-
Verified Purchaser
Reviewer data not yet gathered.
Least Trusted Reviews
User did not leave written text for this review. [Go to full review]
Dec 27, 2015
0%
TRUST
TRUST
-
Unverified Purchaser -
Overrepresented word count (0 words)
-
Overrepresented Participation (posted 11 Reviews) -
Critical Reviewer (avg. rating: 3.6)
Analysis Details
Fail Unverified Purchases
Unverified Purchases
28 of the 2,291 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 3.1 while the verified purchasers have rated this product an average of 4.0. 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.
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.
Fail Suspicious Reviewers
Suspicious Reviewers
Never-Verified Reviewers
21 of the 2,291 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.3 while the reviewers who have written at least one verified purchase review rated this product an average of 4.0. 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.
Fail Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
2% also reviewed:
Verbatim バーベイタム 1回録画用 DVD-R... by バーベイタムジャパン(Verbatim Japan)
1% also reviewed:
HORIC ハイスピードHDMIケーブル 5.0m... by ホーリック(HORIC)
1% also reviewed:
Amazonベーシック... by Amazonベーシック(AmazonBasics)
1% also reviewed:
東芝 温水洗浄便座... by 東芝(TOSHIBA)
1% also reviewed:
パナソニック エチケットカッター... by パナソニック(Panasonic)
Does not include products
from the same brand
from the same brand
162 of the 2,291 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.1 while the reviewers who have a more unique product review history rated this product an average of 3.9. 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.
Warn Rating Trend
Rating Trend
-
- 9%
- Created over 37 days
We counted 2,291 reviews for this product over the span of 3,907 days, an average of 0.6 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 37 days exceeding this threshold:In total, we found that 208 reviews were created on just 37 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.
Warn Word Count Comparison
Word Count Comparison
Word counts are approximated for Hanzi and Kanji
-
- 100%
- 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 2,285 reviews (or 100%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
Warn Reviewer Participation
Reviewer Participation
-
- 70%
- 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:In total, we found that 1600 reviewers (or 70%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Reviewer Ease
Reviewer Ease
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, while the average ease score for reviewers in this category is 4.2.
4.0 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass Deleted Reviews
Deleted Reviews
- 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:
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.
N/A Phrase Repetition
Phrase Repetition
We have not yet completed optimization for this test for Hanzi or Kanji.
N/A Incentivized Reviews
Incentivized Reviews
We have not yet completed optimization for this test for Hanzi or Kanji.