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Verbatim バーベイタム くり返し録画用 ブルーレイディスク BD-RE DL 50GB 5枚...
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From バーベイタムジャパン(Verbatim Japan)
This report was last updated 5/25/2021.
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 Info:
Note: While Amazon.co.jp claims 2,269 Ratings, we counted 1,130 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Fail Overall Grade
FAIL Unverified Purchases
FAIL Suspicious Reviewers
FAIL Overlapping Review History
WARN Word Count Comparison
WARN Reviewer Participation
PASS Rating Trend
PASS Reviewer Ease
PASS Brand Repeats
PASS Deleted Reviews
N/A Phrase Repetition
N/A Incentivized Reviews
Most Trusted Reviews
User did not leave written text for this review. [Go to full review]
Dec 6, 2012
73%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (0 words)
- Easy Grader (avg. rating: 4.5)
Least Trusted Reviews
User did not leave written text for this review. [Go to full review]
Sep 26, 2011
0%
TRUST
TRUST
- Unverified Purchaser
- Overrepresented word count (0 words)
- Take-Back Reviewer (2 deleted Reviews; avg. rating: 3.5)
- Overlapping Review History: reviewed 1 of 9 top products
- Critical Reviewer (avg. rating: 4.1)
Analysis Details
Fail Unverified Purchases
20 of the 1,130 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 2.6 while the verified purchasers have rated this product an average of 3.8. 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
One-Hit Wonders
80 of the 1,130 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.0 while the reviewers who have posted more than one review have rated this product an average of 3.8. 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
Reviewers of this product have ALSO reviewed the following products:
5% also reviewed:
三菱ケミカルメディア Verbatim... by 三菱ケミカルメディア
4% 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)
2% also reviewed:
サンワサプライ 1枚収納×50枚セット... by サンワサプライ
1% also reviewed:
HORIC ハイスピードHDMIケーブル 2.0m... 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:
HORIC アンテナ混合・分波器... by ホーリック(HORIC)
1% also reviewed:
サンワサプライ... by サンワサプライ
1% also reviewed:
Amazonベーシック... by Amazonベーシック(AmazonBasics)
1% also reviewed:
ソニー ビデオ用ブルーレイディスク... by ソニー(SONY)
152 of the 1,130 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.2 while the reviewers who have a more unique product review history 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.
Warn 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 1,129 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
-
- 69%
- 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 784 reviewers (or 69%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Rating Trend
-
- 0%
- Created over 1 day
We counted 1,130 reviews for this product over the span of 3,588 days, an average of 0.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.
However, we see the following 1 day exceeding this threshold:In total, we found that 4 reviews were created on just 1 day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass 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 3.8, while the average ease score for reviewers in this category is 4.2.
3.8 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
22 of the 1,130 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.
Pass 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
We have not yet completed optimization for this test for Hanzi or Kanji.
N/A Incentivized Reviews
We have not yet completed optimization for this test for Hanzi or Kanji.