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ロジクール ワイヤレスマウス 無線 薄型 マウス M557GR Bluetooth 6ボタン M557...
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From Logicool(ロジクール)
This report was last updated 11/21/2020.
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: While Amazon.co.jp claims 1,729 Ratings, we counted 1,142 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
Warn Overall Grade
FAIL Suspicious Reviewers
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Word Count Comparison
WARN Reviewer Participation
PASS Rating Trend
PASS Unverified Purchases
PASS Reviewer Ease
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]
Oct 8, 2020
73%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (0 words)
- Easy Grader (avg. rating: 5.0)
Least Trusted Reviews
good quality and easy to use [Go to full review]
Jul 27, 2019
0%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (5 words)
- Overlapping Review History: reviewed 1 of 9 top products
- Overrepresented Participation (posted 15 Reviews)
- Easy Grader (avg. rating: 4.6)
Analysis Details
Fail Suspicious Reviewers
Never-Verified Reviewers
13 of the 1,142 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.0 while the reviewers who have written at least one verified purchase review rated this product an average of 4.0. 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:
2% also reviewed:
Amazonベーシック PCケース... by Amazonベーシック(AmazonBasics)
2% also reviewed:
パナソニック エチケットカッター... by パナソニック(Panasonic)
2% also reviewed:
パナソニック カナル型イヤホン... by パナソニック(Panasonic)
2% also reviewed:
Anker... by
2% also reviewed:
シリコンパワー ノートPC用メモリ... by シリコンパワー
2% also reviewed:
Amazonベーシック... by Amazonベーシック(AmazonBasics)
1% also reviewed:
PLANEX 無線LAN子機 (USB3.0アダプター型)... by プラネックス
1% also reviewed:
Anker PowerCore 10000 (10000mAh 大容量... by
Does not include products
from the same brand
from the same brand
140 of the 1,142 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.1 while the reviewers who have a more unique product review history rated this product an average of 3.9. 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 4 deleted Reviews for this product, with an average rating of 4. 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 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 1,129 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
-
- 66%
- 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 759 reviewers (or 66%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Rating Trend
-
- 0%
- Created over 1 day
We counted 1,142 reviews for this product over the span of 2,596 days, an average of 0.4 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.
However, we see the following 1 day exceeding this threshold:In total, we found that 5 reviews were created on just 1 day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Unverified Purchases
62 of the 1,142 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 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
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
202 of the 1,142 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
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.