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【Amazon.co.jp限定】 掃除機不要! 衣類圧縮袋 M・L 各5枚 10枚組 日本製 旅行...
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From エムワールド(Emu-world)
This report was last updated 7/17/2019.
Refresh the report to view the most up-to-date data available:
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Report Card
Pass Overall Grade
FAIL Suspicious Reviewers
FAIL Word Count Comparison
FAIL Overlapping Review History
WARN Rating Trend
WARN Reviewer Participation
PASS Unverified Purchases
PASS Reviewer Ease
PASS Brand Repeats
PASS Deleted Reviews
N/A Phrase Repetition
N/A Incentivized Reviews
Most Trusted Reviews
こういうアイテムは掃除... [Go to full review]
Apr 23, 2016
100%
TRUST
TRUST
- Verified Purchaser
- Critical Reviewer (avg. rating: 3.1)
Least Trusted Reviews
自宅用・旅行用... [Go to full review]
Apr 16, 2016
30%
TRUST
TRUST
- Verified Purchaser
- Created on a high volume day
- Overrepresented word count (164 words)
- Take-Back Reviewer (3 deleted Reviews; avg. rating: 4.7)
- Overlapping Review History: reviewed 4 of 9 top products
- Overrepresented Participation (posted 255 Reviews)
- Critical Reviewer (avg. rating: 4.0)
Analysis Details
Fail Suspicious Reviewers
One-Hit Wonders
8 of the 307 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 2.6 while the reviewers who have posted more than one review have rated this product an average of 4.1. 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
15 of the 307 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.
Fail Word Count Comparison
Word counts are approximated for Hanzi and Kanji
-
- 22%
- 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 69 reviews (or 22%) are within an overrepresented word count group. These reviews have rated this product an average of 4.3, while all other reviews have 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.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
6% also reviewed:
Amazonベーシック Apple認証... by Amazonベーシック(AmazonBasics)
4% also reviewed:
Jaybird X3 ワイヤレスイヤホン... by Jaybird(ジェイバード)
4% also reviewed:
ブラウン オーラルB 電動歯ブラシ... by ブラウン(BRAUN)
3% also reviewed:
【2016年モデル】フィリップス... by
3% also reviewed:
Jaybird フルワイヤレスイヤホン... by Jaybird(ジェイバード)
3% also reviewed:
Logicool G ゲーミングヘッドセット... by Logicool(ロジクール)
3% also reviewed:
【Amazon.co.jp限定】パナソニック... by パナソニック(Panasonic)
Does not include products
from the same brand
from the same brand
70 of the 307 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.4 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
-
- 15%
- Created over 9 days
We counted 307 reviews for this product over the span of 1,178 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 9 days exceeding this threshold:In total, we found that 46 reviews were created on just 9 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 Reviewer Participation
-
- 37%
- 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 114 reviewers (or 37%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.
Pass Unverified Purchases
4 of the 307 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.
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 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 Repeaters
We didn't detect a substantial amount of Brand Repeaters.
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.