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【第2世代 LEDディスプレイ】Bluetooth イヤホン 独立オン/オフ イヤホン...
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This report was last updated 12/29/2020.
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Refresh the report to view the most up-to-date data available:
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Report Info:
Note: While Amazon.co.jp claims 1,783 Ratings, we counted 1,122 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 Rating Trend
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Suspicious Reviewers
WARN Reviewer Ease
WARN Word Count Comparison
WARN Reviewer Participation
PASS Unverified Purchases
PASS Brand Repeats
N/A Phrase Repetition
N/A Incentivized Reviews
Most Trusted Reviews
User did not leave written text for this review. [Go to full review]
Nov 15, 2020
73%
TRUST
TRUST
- Unverified Purchaser
- Overrepresented word count (0 words)
- Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
- Critical Reviewer (avg. rating: 3.4)
Least Trusted Reviews
User did not leave written text for this review. [Go to full review]
Jan 6, 2020
0%
TRUST
TRUST
- Verified Purchaser
- Created on a high volume day
- Overrepresented word count (0 words)
- Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
- Overlapping Review History: reviewed 1 of 9 top products
- Overrepresented Participation (posted 4 Reviews)
- Critical Reviewer (avg. rating: 2.8)
Analysis Details
Fail Rating Trend
-
- 31%
- Created over 25 days
We counted 1,122 reviews for this product over the span of 426 days, an average of 2.6 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 25 days exceeding this threshold:In total, we found that 350 reviews were created on just 25 days. The reviews on these high volume days have rated this product an average of 4.7 while reviews from other days 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.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
3% also reviewed:
【令和モデル第2世代... by Hiyoo
2% also reviewed:
【2020年度版】ヨガマット... by ブランド: Waways
1% also reviewed:
【進化版 Bluetooth5.0第2世代】 Bluetooth... by Anpoow
1% also reviewed:
【2019最新版 140時間連続駆動... by Hihiccup
Does not include products
from the same brand
from the same brand
91 of the 1,122 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.9 while the reviewers who have a more unique product review history rated this product an average of 4.3. 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 Deleted Reviews
We discovered a total of 44 deleted Reviews for this product, with an average rating of 4.8. 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.
Warn Suspicious Reviewers
One-Hit Wonders
251 of the 1,122 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, the discrepancy in ratings between the One-Hit Wonders and reviewers who have posted more than one review isn't significant enough to rule out the possibility of it being due to random chance.
Warn 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 4.3, while the average ease score for reviewers in this category is 4.2. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.3 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
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 1,109 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
-
- 63%
- 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 712 reviewers (or 63%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
57 of the 1,122 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 Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
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.