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

PASS
Skewed Helpfulness

Most Trusted Reviews
They ok for the price. Not staying in my ears ... [Go to full review]
May 20, 2016
100%
TRUST
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
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 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.
4.5 average rating of deleted reviews
Read more about our Deleted Reviews test.
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.
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.
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.
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.
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.
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.
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.
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.
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
(15.0%)
(15.0%)
2 reviews
(10.0%)
(10.0%)
2 reviews
(10.0%)
(10.0%)
Common Phrases in Titles:
4 reviews
(20.0%)
(20.0%)
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.
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.
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.
Read more about our Word Count Comparison test.
Pass
Overlapping Review History

10% also reviewed:
VIIVRIA ® Wireless Charging Pad For Samsung... by VIIVRIA
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.
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.
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
Read more about our Reviewer Ease 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.
0.0 average net helpfulness for positive reviews
0.0 average net helpfulness for negative reviews
Read more about our Skewed Helpfulness test.