Close
【進化版Bluetooth5.0 150時間連続駆動 5000mAh超大容量】 イヤホン Bluetooth...
More product info
This report was last updated 9/27/2020.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
View/Edit Adjustment
Jump to Report Card
Report Info:
Note: While Amazon.co.jp claims 1,956 Ratings, we counted 1,172 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 Deleted Reviews
FAIL Rating Trend
FAIL Suspicious Reviewers
FAIL Overlapping Review History
WARN Word Count Comparison
WARN Reviewer Participation
PASS Unverified Purchases
PASS Reviewer Ease
PASS Brand Repeats
N/A Phrase Repetition
N/A Incentivized Reviews
Most Trusted Reviews
Sound Quality... [Go to full review]
Jun 28, 2019
100%
TRUST
TRUST
- Verified Purchaser
- Critical Reviewer (avg. rating: 3.9)
Least Trusted Reviews
User did not leave written text for this review. [Go to full review]
Sep 10, 2019
0%
TRUST
TRUST
- Verified Purchaser
- Created on a high volume day
- Overrepresented word count (0 words)
- Overrepresented Participation (posted 5 Reviews)
- Critical Reviewer (avg. rating: 3.3)
Analysis Details
Fail Deleted Reviews
We discovered a total of 347 deleted Reviews for this product, with an average rating of 5. 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.
Fail Rating Trend
-
- 9%
- Created over 9 days
We counted 1,172 reviews for this product over the span of 480 days, an average of 2.4 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 9 or fewer reviews on any given day.
However, we see the following 9 days exceeding this threshold:In total, we found that 102 reviews were created on just 9 days. The reviews on these high volume days have rated this product an average of 3.9 while reviews from other days have rated this product an average of 3.5. 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 Suspicious Reviewers
One-Hit Wonders
306 of the 1,172 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
40 of the 1,172 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 4.1 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 3.5. 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:
2% also reviewed:
【2019進化版 Bluetooth5.0 3500mAh】... by Anero
2% also reviewed:
スマートウォッチ 2019最新 血圧計... by Semiro
1% also reviewed:
折りたたみ傘 自動開閉 頑丈な12本骨... by TSUNEO.
1% also reviewed:
マウス BLENCK ワイヤレスマウス... by BLENCK
1% also reviewed:
リュック メンズ 大容量... by TSUNEO.
1% also reviewed:
LEDランタン 高輝度... by Vantozon
1% also reviewed:
【最新版】 Bluetooth イヤホン 骨伝導... by GOOSERA
1% also reviewed:
KAKUSAN 美容ローラー Y字型 充電不要... by
1% also reviewed:
【令和第2世代 180時間連続駆動】... by
85 of the 1,172 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.8 while the reviewers who have a more unique product review history 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.
Warn Word Count Comparison
Word counts are approximated for Hanzi and Kanji
-
- 99%
- 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 1,159 reviews (or 99%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
Warn Reviewer Participation
-
- 67%
- 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 782 reviewers (or 67%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
153 of the 1,172 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 3.7, while the average ease score for reviewers in this category is 4.2.
3.7 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
39 of the 1,172 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.
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.