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FitStill Gopro Hero 7 Black /6 /5 (2018) に適用強化ガラスフィルムセット...
More product info From FiTSTILL

65% of potentially unnatural reviews removed (why?)
Adjusted:
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Report Card

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

Most Trusted Reviews

傷がつきにくく... [Go to full review]
Oct 3, 2013      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 3.0)


Least Trusted Reviews

ガラス系の保護フィルム... [Go to full review]
Jan 7, 2019      
0% TRUST
  • Unverified Purchaser
  • Created on a high volume day
  • Overrepresented word count (41 words)
  • Never-Verified Reviewer
  • Overlapping Review History: reviewed 1 of 9 top products
  • Overrepresented Participation (posted 25 Reviews)
  • Critical Reviewer (avg. rating: 4.2)


Analysis Details

Fail Rating Trend

  • 34%
  • Created over 16 days

We counted 182 reviews for this product over the span of 2,457 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.

However, we see the following 16 days exceeding this threshold:In total, we found that 61 reviews were created on just 16 days. The reviews on these high volume days have rated this product an average of 4.8 while reviews from other days 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 reviews created on high volume days

from reviews created on normal volume days


4.8
4.1


Read more about our Rating Trend test.

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


  • 62%
  • 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 113 reviews (or 62%) are within an overrepresented word count group. These reviews have rated this product an average of 4.5, while all other reviews have rated this product an average of 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.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.5
4.2


Read more about our Word Count Comparison test.

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

Does not include products
from the same brand


20 of the 182 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.8 while the reviewers who have a more unique product review history rated this product an average of 4.3. 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 reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.8
4.3


Read more about our Overlapping Review History test.

Fail Reviewer Participation

  • 80%
  • 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 145 reviewers (or 80%) are within an overrepresented participation group. These reviews have rated this product an average of 4.5, while all other reviews have 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.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.5
3.9


Read more about our Reviewer Participation test.

Warn Suspicious Reviewers

One-Hit Wonders


19 of the 182 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.

from one-hit wonders

from reviewers with more than one review


4.1
4.4


Read more about our Suspicious Reviewers test.

Warn 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 4.3, while the average ease score for reviewers in this category is 4.2. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

4.3 Product's Average Ease Score

4.2 Category's Average Ease Score


4.3
4.2


Read more about our Reviewer Ease test.


Pass Unverified Purchases

10 of the 182 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


4.8
4.3


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 Brand Repeats

Brand Repeaters

We didn't detect a substantial amount of Brand Repeaters.

Pass Deleted Reviews
  • 0
  • Reviews have been deleted
We have not discovered any deleted reviews for this product.

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.

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.