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(33時間連続使用可)4.1Bluetoothイヤホン ヘッドフォン...
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This report was last updated 7/12/2020.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Card
Pass Overall Grade
FAIL Deleted Reviews
WARN Suspicious Reviewers
WARN Word Count Comparison
WARN Reviewer Participation
PASS Rating Trend
PASS Unverified Purchases
PASS Overlapping Review History
PASS Reviewer Ease
PASS Brand Repeats
N/A Phrase Repetition
N/A Incentivized Reviews
Most Trusted Reviews
なんと言っても持続時間... [Go to full review]
Feb 20, 2019
100%
TRUST
TRUST
- Verified Purchaser
Reviewer data not yet gathered.
Least Trusted Reviews
User did not leave written text for this review. [Go to full review]
Dec 4, 2018
46%
TRUST
TRUST
- Verified Purchaser
- 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 8 Reviews)
- Critical Reviewer (avg. rating: 3.3)
Analysis Details
Fail Deleted Reviews
We discovered a total of 13 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
25 of the 171 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.
Warn Word Count Comparison
Word counts are approximated for Hanzi and Kanji
-
- 94%
- 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 160 reviews (or 94%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
Warn Reviewer Participation
-
- 85%
- 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 145 reviewers (or 85%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Rating Trend
-
- 0%
- Created on high-volume days
We counted 171 reviews for this product over the span of 890 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. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Unverified Purchases
3 of the 171 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 Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
2% also reviewed:
Fire TV Stick by Amazon
2% also reviewed:
Echo Dot (エコードット) 第2世代 -... by Amazon
2% also reviewed:
ソニー SONY ワイヤレスイヤホン... by ソニー(SONY)
2% also reviewed:
NANAMI Qi ワイヤレス急速充電器 Quick... by NANAMI
2% also reviewed:
【Newiy Start】 Bluetoothアダプター... by Newiy Start
1% also reviewed:
大塚製薬 ネイチャーメイド... by NATUREMADE(ネイチャーメイド)
1% also reviewed:
Anker Soundcore ポータブル Bluetooth4.2... by Anker
Does not include products
from the same brand
from the same brand
20 of the 171 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.
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 3.9, while the average ease score for reviewers in this category is 4.2.
3.9 Product's Average Ease Score
4.2 Category's Average Ease Score
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.