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AmazonBasics Amplified Indoor/Outdoor TV Antenna - 60 Mile Range From AmazonBasics Report Feedback

Pass Reviews appear natural

Original:

8,177 Reviews

Adjusted:

6,156 Reviews

View/Edit Adjustment
How is this calculated
Last Updated: 11/17/2016
Update Available

Report Card

Click a test to jump to details

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

Most Trusted Reviews

Easy to install, picture quality was excellent. This was much ... [Go to full review]
Jan 29, 2014      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 3.7)


Least Trusted Reviews

The first thing that struck me about the AmazonBasics Ultra ... [Go to full review]
Nov 30, 2013     243 of 268 found this helpful.  
0% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (1 deleted review; avg. rating: 3.0)
  • Brand Repeater (10 of 1811 reviews for this brand; avg rating: 4.5)
  • Overlapping Review History: reviewed 6 of 9 top products
  • Overrepresented Participation (posted 1811 reviews)
  • Critical Reviewer (avg. rating: 4.3)


Analysis Details

Note: While Amazon claims 8,177 reviews, we counted 8,110 available on their site.

Fail Overlapping Review History

1% also reviewed:
Amazon Video by Amazon.com

Does not include products
from the same brand


839 of the 8,110 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.2 while the reviewers who have a more unique product review history rated this product an average of 4.0. 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


4.2
4.0


Read more about our Overlapping Review History test.

Fail Reviewer Participation

  • 67%
  • 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 5459 reviewers (or 67%) are within an overrepresented participation group. These reviews have rated this product an average of 4.0, 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


4.0
3.9


Read more about our Reviewer Participation test.

Warn Deleted Reviews

We discovered a total of 9 deleted reviews for this product, with an average rating of 4.2. 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.

4.2 average rating of deleted reviews

4.2



Read more about our Deleted Reviews test.

Warn Rating Trend

  • 17%
  • Created over 68 days

We counted 8,110 reviews for this product over the span of 1,129 days, an average of 7.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 17 or fewer reviews on any given day.

However, we see the following 68 days exceeding this threshold:In total, we found that 1,405 reviews were created on just 68 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


4.1
4.0


Read more about our Rating Trend test.

Warn Suspicious Reviewers

Take-Back Reviewers


73 of the 8,110 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


4.1
4.0


Read more about our Suspicious Reviewers test.

Pass Unverified Purchases

213 of the 8,110 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


3.8
4.0


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 Word Count Comparison

  • 0%
  • Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.

Pass Phrase Repetition
  • 0%
  • Used substantial repetitive phrases
0 of the 8,110 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.
Read more about our Phrase Repetition 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 4.3.

4.1 Product's Average Ease Score

4.3 Category's Average Ease Score


4.1
4.3


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


854 of the 8,110 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


4.2
4.0


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.

0.7 average net helpfulness for positive reviews

0.4 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.

  • 0%
  • Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
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.