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ドライブレコーダー 前後カメラ VANTRUE N2 Pro 車内+車外 前後 1080P ドラレコ...
More product info From VANTRUE

Amazon Reviews for ドライブレコーダー 前後カメラ VANTRUE N2 Pro 車内+車外 前後 1080P ドラレコ HDR 2カメラ 駐車監視 SONY製センサー LED信号機対策 フルHD ドライブ レコーダー 2.5K&1440P前録モード 1.5型LCD 170+140度広視野角 GPS機能(別売) 前後同時録画 18ヶ月保証期間 動体検知 衝撃録画 高速起動 赤外線暗視機能 256GB(別売)サポート 日本語説明書付き
Rating:
749 Reviews
67% of potentially unnatural reviews removed (Why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card

Report Card

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

Most Trusted Reviews

初めてドラレコを購入し... [Go to full review]
Jul 15, 2019      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 4.0)


Least Trusted Reviews

近頃は不運な事故が多発... [Go to full review]
May 21, 2019      
0% TRUST
  • Unverified Purchaser
  • Overrepresented word count (139 words)
  • One-Hit Wonder
  • Never-Verified Reviewer
  • Overrepresented Participation (posted 1 review)
  • Easy Grader (avg. rating: 5.0)


Analysis Details

Fail Rating Trend

  • 2%
  • Created over 2 days

We counted 749 reviews for this product over the span of 704 days, an average of 1.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 6 or fewer reviews on any given day.

However, we see the following 2 days exceeding this threshold:In total, we found that 16 reviews were created on just 2 days. The reviews on these high volume days have rated this product an average of 5.0 while reviews from other days 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 reviews created on high volume days

from reviews created on normal volume days


5.0
4.5


Read more about our Rating Trend test.

Fail Unverified Purchases

67 of the 749 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.8 while the verified purchasers have rated this product an average of 4.4. 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 unverified purchasers

from verified purchases


4.8
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.

Fail Suspicious Reviewers

One-Hit Wonders


129 of the 749 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, the discrepancy in ratings between the One-Hit Wonders and reviewers who have posted more than one review isn't significant enough to rule out the possibility of it being due to random chance.

from one-hit wonders

from reviewers with more than one review


4.6
4.4


Never-Verified Reviewers


55 of the 749 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 4.9 while the reviewers who have written at least one verified purchase review rated this product an average of 4.4. 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 never-verified reviewers

from reviewers with at least one verified purchase review


4.9
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 Deleted Reviews

We discovered a total of 9 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 the Deleted Reviews test here.

5.0 average rating of deleted reviews

5.0


Show distribution of deleted reviews

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


  • 50%
  • 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 372 reviews (or 50%) are within an overrepresented word count group. While this is more reviews from overrepresented word count groups than we'd expect to see, the discrepancy in ratings between reviews with overrepresented word groups and all other reviews isn’t significant enough to rule out the possibility of it being due to random chance.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.5
4.4


Read more about our Word Count Comparison test.

Warn Reviewer Participation

  • 51%
  • 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 381 reviewers (or 51%) 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


4.5
4.4


Read more about our Reviewer Participation test.

Pass Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:



28 of the 749 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


4.7
4.5


Read more about our Overlapping Review History test.

Pass Brand Repeats

Brand Repeaters


25 of the 749 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.

from Brand Repeaters

from Non-Repeaters


4.8
4.5


Read more about our Brand Repeats 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.


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