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Bluetoothイヤホン...
More product info From Chyu

Amazon Reviews for  Bluetoothイヤホン ブルートゥースイヤホン 完全ワイヤレスイヤホン bluetooth ヘッドセット ブルートゥース ヘッドセット ワイヤレスイヤホン ノイズキャンセリング ハイレゾ イヤホン ポータブルオーディオ ハイレゾ対応 マイク内蔵 スポーツ ヘッドセット 音楽ヘッドフォン  防水Bluetooth4.2 高音質 充電ケース付き 高音質ステレオ 無線 防汗 防滴 ワンボタン設計 通話可 完全独立 ミニ 軽量 完璧な代替品 携帯電話 コンピュータ各種対応 左右分離型 片耳&両耳対応 (白色)
Rating:
47 Ratings
40 Reviews
("Ratings" vs. "Reviews")
63% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Oct 17, 2018
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Note: While Amazon.co.jp claims 47 Ratings, we counted 40 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

Warn Overall Grade
FAIL Suspicious Reviewers
FAIL Reviewer Ease
WARN Word Count Comparison
PASS Rating Trend
PASS Unverified Purchases
PASS Overlapping Review History
PASS Reviewer Participation
PASS Brand Repeats
PASS Deleted Reviews
N/A Phrase Repetition
N/A Incentivized Reviews

Most Trusted Reviews

4/5
自分で似たような物を使... [Go to full review]
Sep 27, 2018      
100% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (2 deleted Reviews; avg. rating: 5.0)
  • Easy Grader (avg. rating: 4.3)


Least Trusted Reviews

3/5
ケースの前面にCHYUの記... [Go to full review]
Sep 14, 2018      
0% TRUST
  • Verified Purchaser
  • Overrepresented word count (58 words)
  • One-Hit Wonder
  • Critical Reviewer (avg. rating: 3.0)


Analysis Details

Fail Suspicious Reviewers

One-Hit Wonders


3 of the 40 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.0 while the reviewers who have posted more than one review have rated this product an average of 4.5. 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.

from one-hit wonders

from reviewers with more than one review


3.0
4.5


Never-Verified Reviewers


10 of the 40 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, the discrepancy in ratings between the Never-Verified Reviewers and reviewers who have written at least one verified purchase review isn't significant enough to rule out the possibility of it being due to random chance.

from never-verified reviewers

from reviewers with at least one verified purchase review


4.6
4.4


Read more about our Suspicious Reviewers test.

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 4.4, 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.

4.4 Product's Average Ease Score

4.2 Category's Average Ease Score


4.4
4.2


Read more about our Reviewer Ease test.


Warn Word Count Comparison
Word counts are approximated for Hanzi and Kanji


  • 68%
  • 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 2 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 27 reviews (or 68%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.3
4.8


Read more about our Word Count Comparison test.

Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 40 reviews for this product over the span of 76 days, an average of 0.5 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 4 or fewer reviews on any given day. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.

Pass Unverified Purchases

10 of the 40 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.

from unverified purchasers

from verified purchases


4.6
4.4


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
  • 0%
  • Substantial overlapping review history
0 of the 40 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.
Read more about our Overlapping Review History test.

Pass Reviewer Participation

  • 0%
  • From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation 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:
  1. 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.
  2. We have no information on reviews that were never published in the first place.
  3. 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.
Read more about our Deleted Reviews test.

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.