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【2019最新型】外付け DVDドライブ USB3.0 Type-c 両対応 外付け ポータブル...
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From Ray Cue
This report was last updated 1/15/2020.
Refresh the report to view the most up-to-date data available:
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Report Card
Fail Overall Grade
FAIL Deleted Reviews
FAIL Reviewer Ease
WARN Rating Trend
WARN Word Count Comparison
WARN Reviewer Participation
PASS Unverified Purchases
PASS Suspicious Reviewers
PASS Overlapping Review History
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]
Aug 11, 2019
73%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (0 words)
- Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
- Easy Grader (avg. rating: 4.4)
Least Trusted Reviews
We couldn't find any low-quality reviewsAnalysis Details
Fail Deleted Reviews
We discovered a total of 45 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.
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.
Warn Rating Trend
-
- 31%
- Created over 4 days
We counted 67 reviews for this product over the span of 177 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 4 days exceeding this threshold:In total, we found that 21 reviews were created on just 4 days. This is an excessively high number of reviews submitted on these high volume days.
Warn Word Count Comparison
Word counts are approximated for Hanzi and Kanji
-
- 85%
- 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 57 reviews (or 85%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
Warn Reviewer Participation
-
- 54%
- 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 36 reviewers (or 54%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
2 of the 67 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 Suspicious Reviewers
One-Hit Wonders
4 of the 67 reviewers have only reviewed this product. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Never-Verified Reviewers
1 of the 67 reviewers have never written a verified purchase review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Take-Back Reviewers
3 of the 67 reviewers have had at least one of their past reviews for another product deleted. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Single-Day Reviewers
We didn't detect a substantial amount of Single-Day Reviewers.
Pass Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
7% also reviewed:
RAVPower モバイルバッテリー... by RAVPOWER
6% also reviewed:
Wellnice 外付けDVDドライブUSB 3.0 DVD... by Wellnice
6% also reviewed:
モバイルバッテリー 薄型 Qi 軽量... by Nakyo
6% also reviewed:
【最新版100LED】Focondot... by Focondot
6% also reviewed:
【進化版 Bluetooth 5.0... by Dekida
6% also reviewed:
Woqatac USB Type C ハブ 11in1 USB C ハブ Type... by Woqatac
6% also reviewed:
【2019最新bluetooth イヤホン... by Supama
6% also reviewed:
ワイヤレス イヤホン Bluetooth 5.0 IPX6... by Boltune
17 of the 67 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 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.