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【Amazon.co.jp限定】Primero(プリメロ) 充電式インパクトドライバー 7.2V IDR-72AZA
More product info From Primero(プリメロ)

Amazon Reviews for  【Amazon.co.jp限定】Primero(プリメロ) 充電式インパクトドライバー 7.2V IDR-72AZA
Rating:
108 Ratings
57 Reviews
("Ratings" vs. "Reviews")
0% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Jul 11, 2021
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Show Report History
Note: While Amazon.co.jp claims 108 Ratings, we counted 57 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

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

Most Trusted Reviews

4/5
User did not leave written text for this review. [Go to full review]
Sep 29, 2019      
73% TRUST
  • Verified Purchaser
  • Overrepresented word count (0 words)
  • Take-Back Reviewer (1 deleted Review; avg. rating: 4.0)
  • Overlapping Review History: reviewed 3 of 9 top products
  • Critical Reviewer (avg. rating: 3.6)


Least Trusted Reviews

4/5
User did not leave written text for this review. [Go to full review]
Oct 3, 2019      
32% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (0 words)
  • Take-Back Reviewer (1 deleted Review; avg. rating: 4.0)
  • Overlapping Review History: reviewed 2 of 9 top products
  • Critical Reviewer (avg. rating: 3.2)


Analysis Details

Fail Deleted Reviews

We discovered a total of 127 deleted Reviews for this product, with an average rating of 4.1. 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 our Deleted Reviews test.

4.1 average rating of deleted reviews

4.1


Show distribution of deleted reviews

Warn Rating Trend

  • 16%
  • Created over 3 days

We counted 57 reviews for this product over the span of 556 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 3 days exceeding this threshold:In total, we found that 9 reviews were created on just 3 days. This is an excessively high number of reviews submitted on these high volume days.

from reviews created on high volume days

from reviews created on normal volume days


4.4
4.3


Read more about our Rating Trend test.

Warn Suspicious Reviewers

Take-Back Reviewers


26 of the 57 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.

from take-back reviewers

from reviewers without previously deleted reviews


4.4
4.2


Read more about our Suspicious Reviewers test.

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


  • 100%
  • 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 100%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.3
N/A


Read more about our Word Count Comparison test.

Pass Unverified Purchases
  • 0%
  • Unverified Purchases
0 of the 57 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:

Does not include products
from the same brand


27 of the 57 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


4.4
4.2


Read more about our Overlapping Review History test.

Pass Reviewer Participation

  • 28%
  • 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 16 reviewers (or 28%) are within an overrepresented participation group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.4
4.2


Read more about our Reviewer Participation 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 4.1, while the average ease score for reviewers in this category is 4.2.

4.1 Product's Average Ease Score

4.2 Category's Average Ease Score


4.1
4.2


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


8 of the 57 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


4.3
4.3


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.