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AmazonBasics Performance Alkaline Batteries From AmazonBasics Report Feedback

Pass Reviews appear natural

Original:

9,801 Reviews

Adjusted:

7,877 Reviews

View/Edit Adjustment
How is this calculated
Last Updated: 1/8/2017
Update Available

Report Card

Click a test to jump to details

FAIL Suspicious Reviewers
FAIL Word Count Comparison
WARN Rating Trend
PASS Unverified Purchases
PASS Phrase Repetition
PASS Overlapping Review History
PASS Reviewer Participation
PASS Reviewer Ease
PASS Brand Repeats
PASS Skewed Helpfulness
PASS Incentivized Reviews
PASS Deleted Reviews

Most Trusted Reviews

Good Service a day late but will continue shopping for ... [Go to full review]
Nov 26, 2016      
100% TRUST
  • Verified Purchaser
  • Easy Grader (avg. rating: 4.8)


Least Trusted Reviews

Great delivery time and was so happy to get these. ... [Go to full review]
Jul 14, 2016      
0% TRUST
  • Unverified Purchaser
  • One-Hit Wonder
  • Never-Verified Reviewer
  • Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
  • Easy Grader (avg. rating: 5.0)


Analysis Details

Note: While Amazon claims 9,801 reviews, we counted 9,843 available on their site.

Fail Suspicious Reviewers

One-Hit Wonders


118 of the 9,843 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.3 while the reviewers who have posted more than one review 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 one-hit wonders

from reviewers with more than one review


3.3
4.5


Take-Back Reviewers


1,163 of the 9,843 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 4.7 while the reviewers who don't have any deleted reviews in their history 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 take-back reviewers

from reviewers without previously deleted reviews


4.7
4.5


Read more about our Suspicious Reviewers test.

Fail Word Count Comparison

  • 63%
  • 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 6,182 reviews (or 63%) are within an overrepresented word count group. These reviews have rated this product an average of 4.6, while all other reviews 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 reviews with an overrepresented word count

from reviews with a properly represented word count


4.6
4.3


Read more about our Word Count Comparison test.

Warn Rating Trend

  • 13%
  • Created over 42 days

We counted 9,843 reviews for this product over the span of 729 days, an average of 13.5 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 27 or fewer reviews on any given day.

However, we see the following 42 days exceeding this threshold:In total, we found that 1,300 reviews were created on just 42 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


4.5
4.5


Read more about our Rating Trend test.

Pass Unverified Purchases

510 of the 9,843 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


4.5
4.5


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:
199 reviews
(2.0%)
300 reviews
(3.0%)
246 reviews
(2.5%)
162 reviews
(1.6%)
122 reviews
(1.2%)
332 reviews
(3.4%)
Show MoreShow Less
Common Phrases in Titles:
156 reviews
(1.6%)


553 of the 9,843 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


4.5
4.5


Read more about our Phrase Repetition test.

Pass Overlapping Review History
Does not include products
from the same brand


64 of the 9,843 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 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 4.4, while the average ease score for reviewers in this category is 4.4.

4.4 Product's Average Ease Score

4.4 Category's Average Ease Score


4.4
4.4


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


2,094 of the 9,843 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


4.7
4.5


Read more about our Brand Repeats test.

Pass Skewed Helpfulness
We examined the average net helpfulness score of negative reviews against the average net helpfulness score of positive reviews. The net helpfulness score is the number of times a review has been marked as helpful minus the number of times a review has been marked as unhelpful. We could not find any statistically significant difference in average net helpfulness score between the negative reviews and positive reviews.

0.2 average net helpfulness for positive reviews

2.2 average net helpfulness for negative reviews


Read more about our Skewed Helpfulness 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.


7 of the 9,843 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


4.4
4.5


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.

Pass Deleted Reviews
  • 0
  • Reviews have been deleted
We have not discovered any deleted reviews for this product.
Read more about our Deleted Reviews test.