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ivolks Bluetooth Headphones V4.1 Wireless Sport Headphones Stereo In-Ear Noise Cancelling... From IVOLKS Report Feedback

Fail Unnatural reviews detected

Original:

11 Reviews

Adjusted:

4 Reviews

Rank in: Headphones
40%
22%

View/Edit Adjustment
How is this calculated
Report Last Updated: Feb 13, 2017
Update Available
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Report Card

Click a test to jump to details

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

They ok for the price. Not staying in my ears ... [Go to full review]
May 20, 2016      
100% TRUST
  • Verified Purchaser
  • Easy Grader (avg. rating: 4.3)


Least Trusted Reviews

This one is also bought my cousin sister for her ... [Go to full review]
Mar 1, 2016      
0% TRUST
  • Unverified Purchaser
  • Never-Verified Reviewer
  • Single-Day Reviewer (posted all reviews on Mar 1, 2016)
  • Brand Loyalist (2 of 4 reviews for this brand; avg rating: 4.0)
  • Easy Grader (avg. rating: 4.3)


Analysis Details

Note: While Amazon.com claims 11 reviews, we counted 20 available on their site.

Fail Deleted Reviews

We discovered a total of 2 deleted reviews for this product, with an average rating of 4.5. 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.

4.5 average rating of deleted reviews

4.5


Show distribution of deleted reviews

Fail Unverified Purchases

15 of the 20 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.2 while the verified purchasers have rated this product an average of 2.8. 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 unverified purchasers

from verified purchases


4.2
2.8


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.

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


5 of the 20 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. Incentivized reviews have rated this product an average of 4.6 while reviews that were not incentivized rated this product an average of 3.6. 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 incentivized reviews

from non-incentivized reviews


4.6
3.6


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.

Fail Brand Repeats

Brand Repeaters


6 of the 20 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


4.2
3.7


Brand Loyalists


3 of the 20 reviewers have reviewed multiple products but half or more of their reviews are for this brand. This is an excessively large percentage of Brand Loyalists which may indicate unnatural reviews.

from Brand Loyalists

from Non-Loyalists


4.0
3.8


Brand Monogamists


1 of the 20 reviewers has reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.

from Brand Monogamists

from Non-Monogamists


4.0
3.8


Read more about our Brand Repeats test.

Fail Suspicious Reviewers

Never-Verified Reviewers


9 of the 20 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, the discrepancy in ratings between the Never-Verified Reviewers and reviewers who have written at least one verified purchase review isn't significant enough to rule out the possibility of it being due to random chance.

from never-verified reviewers

from reviewers with at least one verified purchase review


4.0
3.7


Take-Back Reviewers


6 of the 20 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.

from take-back reviewers

from reviewers without previously deleted reviews


4.3
3.6


Single-Day Reviewers


9 of the 20 reviewers have written multiple reviews but posted all of them on a single day. This is an excessively large percentage of Single-Day Reviewers which may indicate unnatural reviews.

from single-day reviewers

from non-single-day reviewers


4.0
3.7


Read more about our Suspicious Reviewers test.

Warn 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:
3 reviews
Common Phrases in Titles:
4 reviews


8 of the 20 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.0
3.8


Read more about our Phrase Repetition test.

Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 20 reviews for this product over the span of 271 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. We didn't find any days exceeding this threshold.
Read more about our Rating Trend 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 Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:



2 of the 20 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


4.5
3.8


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 4.1, while the average ease score for reviewers in this category is 4.1.

4.1 Product's Average Ease Score

4.1 Category's Average Ease Score


4.1
4.1


Read more about our Reviewer Ease test.



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