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【2019最新版】Bluetooth イヤホン 完全 ワイヤレス イヤホン スポーツ...
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From HIEMAO
This report was last updated 9/3/2019.
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 Info:
Note: While Amazon.co.jp claims 456 Ratings, we counted 459 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 Suspicious Reviewers
FAIL Reviewer Ease
FAIL Word Count Comparison
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Reviewer Participation
PASS Unverified Purchases
PASS Brand Repeats
N/A Phrase Repetition
N/A Incentivized Reviews
Most Trusted Reviews
(追記)本体もバッテリ... [Go to full review]
Jul 2, 2019
59%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (200 words)
- Take-Back Reviewer (3 deleted Reviews; avg. rating: 4.7)
- Critical Reviewer (avg. rating: 3.3)
Least Trusted Reviews
見た目のデザインで一目... [Go to full review]
Apr 8, 2019
0%
TRUST
TRUST
- Verified Purchaser
- Created on a high volume day
- Overrepresented word count (74 words)
- Take-Back Reviewer (2 deleted Reviews; avg. rating: 5.0)
- Overlapping Review History: reviewed 2 of 9 top products
- Overrepresented Participation (posted 21 Reviews)
- Easy Grader (avg. rating: 4.4)
Analysis Details
Fail Rating Trend
-
- 44%
- Created over 13 days
We counted 459 reviews for this product over the span of 157 days, an average of 2.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 10 or fewer reviews on any given day.
However, we see the following 13 days exceeding this threshold:In total, we found that 203 reviews were created on just 13 days. The reviews on these high volume days have rated this product an average of 5.0 while reviews from other days have rated this product an average of 4.6. 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
19 of the 459 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.7 while the reviewers who have posted more than one review have rated this product an average of 4.8. 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 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 4.8, 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.
4.8 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
-
- 83%
- 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 381 reviews (or 83%) are within an overrepresented word count group. These reviews have rated this product an average of 4.8, while all other reviews have rated this product an average of 4.6. 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:
10% also reviewed:
【2019最新版】 スマートウォッチ... by
10% also reviewed:
2019最新版 4000mAh... by FOYOUNG
9% also reviewed:
【進化版 3600mAh IPX7完全防水】Bluetooth... by Hihiccup
8% also reviewed:
2019最新版 Hihiccup USB 3.0外付け DVD... by Hihiccup
6% also reviewed:
[進化版 IPX5完全防水] 白 Bluetooth... by iHarbort
6% also reviewed:
[2019最新版 Bluetooth5.0 イヤホン]... by Tinyboy-hbq
5% also reviewed:
Vkaiy EMS スタイルマット... by Vkaiy
Does not include products
from the same brand
from the same brand
153 of the 459 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 5.0 while the reviewers who have a more unique product review history 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 Deleted Reviews
We discovered a total of 2 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.
Warn Reviewer Participation
-
- 76%
- 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 349 reviewers (or 76%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
8 of the 459 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.