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DBPOWER Bluetooth 4.0 Kopfhörer Sport, Stereo-Headsets, Hands-free Lauftraining Earbuds...
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This report was last updated 3/23/2017.
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Last Updated: Mar 23, 2017
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Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Fail Overall Grade
FAIL Unverified Purchases
FAIL Suspicious Reviewers
FAIL Phrase Repetition
FAIL Overlapping Review History
WARN Rating Trend
WARN Reviewer Ease
PASS Word Count Comparison
PASS Reviewer Participation
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews
Most Trusted Reviews
Habe mir dieses Headset bestellt, da ich den Versuch machen ... [Go to full review]
Sep 26, 2015
100%
TRUST
TRUST
- Verified Purchaser
- Single-Day Reviewer (posted all reviews on Sep 26, 2015)
- Critical Reviewer (avg. rating: 3.5)
Least Trusted Reviews
Von der Soundqualität her bin ich überzeugt. Aber leider komme ... [Go to full review]
Sep 14, 2015
0%
TRUST
TRUST
- Unverified Purchaser
- Contains repetitive phrases (show)
- Take-Back Reviewer (47 deleted Reviews; avg. rating: 4.5)
- Overlapping Review History: reviewed 1 of 9 top products
- Easy Grader (avg. rating: 4.4)
Analysis Details
Fail Unverified Purchases
72 of the 108 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.3 while the verified purchasers have rated this product an average of 3.1. 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 Suspicious Reviewers
One-Hit Wonders
8 of the 108 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 2.4 while the reviewers who have posted more than one review have 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.
Take-Back Reviewers
36 of the 108 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 4.4 while the reviewers who don't have any deleted reviews in their history have 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.
Fail 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:
Show MoreShow Less
3 reviews
3 reviews
40 reviews
15 reviews
9 reviews
2 reviews
2 reviews
8 reviews
9 reviews
2 reviews
78 of the 108 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.1 while reviews without substantial repetitive phrases rated this product an average of 3.3. 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.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
32% also reviewed:
Smart Digitale Küchenwaage,... by Generic
14% also reviewed:
Externer Akku, Swees® 20000mAh Dual USB Ausgang... by Swees
13% also reviewed:
Duracell Ultra Power Typ AA Alkaline Batterien,... by Duracell
12% also reviewed:
LIHAO Gaming Maus 5500DPI 7 Tasten USB Wired für... by LIHAO
12% also reviewed:
Dailyart Messerschärfer, Messer Schärfen 3... by Dailyart
11% also reviewed:
CMYK® 30er LED Solar Globe Garten Lichterkette... by CMYK
10% also reviewed:
Digitales Oberarm Blutdruckmessgerät Meter IHB... by db DBPOWER
Does not include products
from the same brand
from the same brand
42 of the 108 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.4 while the reviewers who have a more unique product review history rated this product an average of 3.5. 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.
Warn Rating Trend
-
- 24%
- Created over 6 days
We counted 108 reviews for this product over the span of 400 days, an average of 0.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.
However, we see the following 6 days exceeding this threshold:In total, we found that 26 reviews were created on just 6 days. This is an excessively high number of reviews submitted on these high volume days.
Warn 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 4.2, while the average ease score for reviewers in this category is 4.1. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.2 Product's Average Ease Score
4.1 Category's Average Ease Score
Read more about our Reviewer Ease 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 Reviewer Participation
-
- 21%
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 23 reviewers (or 21%) are within an overrepresented participation group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
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.
2 of the 108 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.
Read more about our Incentivized Reviews test. 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.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- 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.
- We have no information on reviews that were never published in the first place.
- 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.