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Bluetooth イヤホン【Bluetooth5.0 EDR IPX7完全防水】完全ワイヤレス イヤホン...
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This report was last updated 7/1/2019.
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
Fail Overall Grade
FAIL Reviewer Ease
FAIL Word Count Comparison
WARN Rating Trend
WARN Suspicious Reviewers
WARN Reviewer Participation
PASS Unverified Purchases
PASS Overlapping Review History
PASS Brand Repeats
PASS Deleted Reviews
N/A Phrase Repetition
N/A Incentivized Reviews
Most Trusted Reviews
使い物になりませんでし... [Go to full review]
Jun 21, 2019
100%
TRUST
TRUST
- Verified Purchaser
Reviewer data not yet gathered.
Least Trusted Reviews
ジムで使えたら良いなと... [Go to full review]
Jun 23, 2019
10%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (155 words)
- Overrepresented Participation (posted 7 Reviews)
- Critical Reviewer (avg. rating: 3.3)
Analysis Details
Fail 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 4.9, while the average ease score for reviewers in this category is 4.2. 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.
4.9 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Fail Word Count Comparison
Word counts are approximated for Hanzi and Kanji
-
- 74%
- 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 3 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 280 reviews (or 74%) are within an overrepresented word count group. These reviews have rated this product an average of 4.9, while all other reviews have rated this product an average of 4.7. 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 Rating Trend
-
- 10%
- Created over 2 days
We counted 378 reviews for this product over the span of 58 days, an average of 6.5 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 16 or fewer reviews on any given day.
However, we see the following 2 days exceeding this threshold:In total, we found that 37 reviews were created on just 2 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 Suspicious Reviewers
One-Hit Wonders
71 of the 378 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.
Take-Back Reviewers
2 of the 378 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.
Warn Reviewer Participation
-
- 83%
- 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 315 reviewers (or 83%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
14 of the 378 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 Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
3% also reviewed:
【令和最新版 Bluetooth 5.0... by
3% also reviewed:
モバイルバッテリー大容量 24000mah... by huaf
2% also reviewed:
[進化版 IPX5完全防水] 白 Bluetooth... by iHarbort
2% also reviewed:
スマートウォッチ 活動量計 血圧... by yoiyasu
2% also reviewed:
Kimitech ハンディクリーナー ハンド... by Kimitech
2% also reviewed:
【2019最新版 3500mAh... by OKIMO
2% also reviewed:
【2019最新端 Bluetooth5.0】Bluetooth... by IGYLAR
2% also reviewed:
【クアルコム 5.0... by Jacess
2% also reviewed:
【... by
50 of the 378 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
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.