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AmazonBasics Performance Alkaline Batteries From AmazonBasics Report Feedback

Warn Unnatural reviews possible

Original:

23,452 Reviews

Adjusted:

15,359 Reviews

Rank in: AA
38%
38%

View/Edit Adjustment
How is this calculated
Report Last Updated: Nov 12, 2018
Show Report History
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Report Card

Click a test to jump to details

FAIL Deleted Reviews
FAIL Suspicious Reviewers
FAIL Word Count Comparison
FAIL Overlapping Review History
WARN Rating Trend
WARN Brand Repeats
PASS Unverified Purchases
PASS Phrase Repetition
PASS Reviewer Participation
PASS Reviewer Ease
PASS Incentivized Reviews
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Other analysis for this product:


Original:

327 Reviews


Adjusted:

220 Reviews

AmazonBasics Performance Alkaline Batteries From AmazonBasics

Fail Unnatural reviews detected


Original:

874 Reviews


Adjusted:

551 Reviews

Most Trusted Reviews

Oct 13, 2015      
50% TRUST
  • Verified Purchaser
  • Overrepresented word count (1 word)
  • Take-Back Reviewer (2 deleted reviews; avg. rating: 5.0)
  • Brand Repeater (2 of 375 reviews for this brand; avg rating: 5.0)
  • Overlapping Review History: reviewed 1 of 9 top products
  • Easy Grader (avg. rating: 4.5)


Least Trusted Reviews

5/5
looks good. no complaints. [Go to full review]
Oct 16, 2017      
0% TRUST
  • Unverified Purchaser
  • Overrepresented word count (4 words)
  • One-Hit Wonder
  • Never-Verified Reviewer
  • Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
  • Easy Grader (avg. rating: 5.0)


Analysis Details


Fail Deleted Reviews

We discovered a total of 2,158 deleted reviews for this product, with an average rating of 4.8. 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.

4.8 average rating of deleted reviews

4.8


Show distribution of deleted reviews

Fail Suspicious Reviewers

One-Hit Wonders


650 of the 23,452 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 2.9 while the reviewers who have posted more than one review have 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 one-hit wonders

from reviewers with more than one review


2.9
4.3


Never-Verified Reviewers


86 of the 23,452 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.5 while the reviewers who have written at least one verified purchase review 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 never-verified reviewers

from reviewers with at least one verified purchase review


3.5
4.3


Take-Back Reviewers


5,978 of the 23,452 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.5 while the reviewers who don't have any deleted reviews in their history 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 take-back reviewers

from reviewers without previously deleted reviews


4.5
4.2


Single-Day Reviewers


1,065 of the 23,452 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 4.5 while all other reviewers 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 single-day reviewers

from non-single-day reviewers


4.5
4.3


Read more about our Suspicious Reviewers test.

Fail Word Count Comparison

  • 64%
  • 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 15,123 reviews (or 64%) 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 3.8. 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
3.8


Read more about our Word Count Comparison test.

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

2% also reviewed:
Fire by Amazon

2% also reviewed:
Amazon Prime Video by Amazon.com

Does not include products
from the same brand


3,637 of the 23,452 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.5 while the reviewers who have a more unique product review history 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 reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.5
4.2


Read more about our Overlapping Review History test.

Warn Rating Trend

  • 12%
  • Created over 75 days

We counted 23,452 reviews for this product over the span of 1,431 days, an average of 16.4 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 31 or fewer reviews on any given day.

However, we see the following 75 days exceeding this threshold:In total, we found that 2,799 reviews were created on just 75 days. Although any days with a larger number of reviews than expected is suspicious, these reviews do not appear to have a significant impact on the overall rating.

from reviews created on high volume days

from reviews created on normal volume days


4.3
4.3


Read more about our Rating Trend test.

Warn Brand Repeats

Brand Repeaters


7,298 of the 23,452 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, the discrepancy in ratings between the Brand Repeaters and non-repeaters isn't significant enough to rule out the possibility of it being due to random chance.

from Brand Repeaters

from Non-Repeaters


4.6
4.1


Read more about our Brand Repeats test.

Pass Unverified Purchases

1,072 of the 23,452 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


4.2
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 Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.

Common Phrases in Reviews:
713 reviews
(4.0/5)
397 reviews
(4.4/5)
540 reviews
(3.7/5)
312 reviews
(4.9/5)
784 reviews
(4.1/5)
Show MoreShow Less
Common Phrases in Titles:
331 reviews
(3.5/5)


1,261 of the 23,452 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.2
4.3


Read more about our Phrase Repetition test.

Pass Reviewer Participation

  • 0%
  • From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
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 4.3, while the average ease score for reviewers in this category is 4.3.

4.3 Product's Average Ease Score

4.3 Category's Average Ease Score


4.3
4.3


Read more about our Reviewer Ease test.


Pass Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.


3 of the 23,452 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from incentivized reviews

from non-incentivized reviews


4.0
4.3


Read more about our Incentivized Reviews test, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.


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