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【最新版 LEDディスプレイ Bluetooth イヤホン】Bluetooth 5.0 (ワイヤレス...
More product info From Funitte

Amazon Reviews for  【最新版 LEDディスプレイ Bluetooth イヤホン】Bluetooth 5.0 (ワイヤレス イヤホン) 140時間連続駆動 電池残量インジケーター付き 最軽量4g イヤホン Hi-Fi 高音質 AAC対応 完全ワイヤレスイヤホン 安定接続 左右分離型 ブルートゥース イヤホン 自動ペアリング PSE認証済/技適認証済/Siri対応/iPhone&Android対応 (ブラック)
Rating:
160 Ratings
79 Reviews
("Ratings" vs. "Reviews")
27% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Mar 4, 2021
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Note: While Amazon.co.jp claims 160 Ratings, we counted 79 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

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

Most Trusted Reviews

1/5
User did not leave written text for this review. [Go to full review]
Jan 29, 2020      
73% TRUST
  • Verified Purchaser
  • Overrepresented word count (0 words)
  • Critical Reviewer (avg. rating: 2.2)


Least Trusted Reviews

5/5
User did not leave written text for this review. [Go to full review]
Mar 4, 2020      
3% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (0 words)
  • Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
  • Critical Reviewer (avg. rating: 3.9)


Analysis Details

Fail Deleted Reviews

We discovered a total of 113 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:
  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.

5.0 average rating of deleted reviews

5.0


Show distribution of deleted reviews

Fail Suspicious Reviewers

One-Hit Wonders


18 of the 79 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.1 while the reviewers who have posted more than one review 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.

from one-hit wonders

from reviewers with more than one review


3.1
4.1


Take-Back Reviewers


7 of the 79 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 4.9 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 3.8. 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.

from take-back reviewers

from reviewers without previously deleted reviews


4.9
3.8


Read more about our Suspicious Reviewers test.

Warn Rating Trend

  • 10%
  • Created over 2 days

We counted 79 reviews for this product over the span of 381 days, an average of 0.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.

However, we see the following 2 days exceeding this threshold:In total, we found that 8 reviews were created on just 2 days. Although any days with a larger number of reviews than expected is suspicious, the discrepancy in ratings from reviews created on these high volume days and reviews created on other days isn't significant enough to rule out the possibility of it being due to random chance.

from reviews created on high volume days

from reviews created on normal volume days


4.3
3.9


Read more about our Rating Trend 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 78 reviews (or 99%) 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


3.9
5.0


Read more about our Word Count Comparison test.

Warn Reviewer Participation

  • 62%
  • 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 49 reviewers (or 62%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


3.8
4.0


Read more about our Reviewer Participation test.

Pass Unverified Purchases

7 of the 79 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


4.3
3.9


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:

4% also reviewed:
Bluetooth 5.0... by Otium

Does not include products
from the same brand


13 of the 79 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.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.0
3.9


Read more about our Overlapping Review History 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 4, while the average ease score for reviewers in this category is 4.2.

4.0 Product's Average Ease Score

4.2 Category's Average Ease Score


4.0
4.2


Read more about our Reviewer Ease 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.