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Bluetooth Lautsprecher 20W - BlitzWolf Bluetooth 4.0 Lautsprecher Kraftvoll Bass Tragbarer...
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From BlitzWolf
This report was last updated 11/11/2018.
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FAIL Deleted Reviews
FAIL Unverified Purchases
FAIL Suspicious Reviewers
FAIL Phrase Repetition
FAIL Overlapping Review History
PASS Rating Trend
PASS Word Count Comparison
PASS Reviewer Participation
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
Vom Aussehen her macht das Geräte einen soliden Eindruck. Vom ... [Go to full review]
Jul 28, 2017
100%
TRUST
TRUST
- Verified Purchaser
- Easy Grader (avg. rating: 3.8)
Least Trusted Reviews
Super Box, satter klarer Sound, leicht zu verbinden mit dem ... [Go to full review]
Nov 27, 2017
0%
TRUST
TRUST
- Unverified Purchaser
- Contains repetitive phrases (show)
- Take-Back Reviewer (16 deleted Reviews; avg. rating: 5.0)
- Brand Repeater (2 of 45 reviews for this brand; avg rating: 5.0)
- Overlapping Review History: reviewed 3 of 9 top products
- Easy Grader (avg. rating: 5.0)
Analysis Details
Fail Deleted Reviews
We discovered a total of 49 deleted Reviews for this product, with an average rating of 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:
- 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.
Fail Unverified Purchases
61 of the 185 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.8 while the verified purchasers have rated this product an average of 4.2. 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
Take-Back Reviewers
28 of the 185 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 4.9 while the reviewers who don't have any deleted reviews in their history 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.
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
2 reviews
(4.5/5)
(4.5/5)
2 reviews
(4.5/5)
(4.5/5)
12 reviews
(4.4/5)
(4.4/5)
6 reviews
(4.3/5)
(4.3/5)
6 reviews
(4.0/5)
(4.0/5)
2 reviews
(4.5/5)
(4.5/5)
2 reviews
(4.5/5)
(4.5/5)
8 reviews
(4.9/5)
(4.9/5)
2 reviews
(4.5/5)
(4.5/5)
6 reviews
(4.5/5)
(4.5/5)
102 of the 185 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.5 while reviews without substantial repetitive phrases rated this product an average of 4.2. 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:
4% also reviewed:
APEMAN Action Kamera WIFI sports cam 4K camera... by apeman
4% also reviewed:
Runme Fitness Armbänder mit Herzfrequenz -... by runme
3% also reviewed:
CCBETTER 27 in 1 Sport Action Kamera Zubehör... by CCBETTER
3% also reviewed:
MEMTEQ Bluetooth Lautsprecher-Musikbox LED... by MEMTEQ
3% also reviewed:
Anker 24W 2-Port USB Ladegerät mit PowerIQ... by Anker
3% also reviewed:
[Verbesserte Version] SoundPEATS Bluetooth... by SoundPEATS
2% also reviewed:
CHGeek Auto Ladegerät, 120W 12V/24V USB KFZ... by CHGeek
Does not include products
from the same brand
from the same brand
34 of the 185 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.9 while the reviewers who have a more unique product review history 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.
Pass Rating Trend
-
- 0%
- Created over 2 days
We counted 185 reviews for this product over the span of 734 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 2 days exceeding this threshold:In total, we found that 0 reviews were created on just 2 days. 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 Rating Trend test.
However, we see the following 2 days exceeding this threshold:In total, we found that 0 reviews were created on just 2 days. 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 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 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 4.4, while the average ease score for reviewers in this category is 3.5. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.4 Product's Average Ease Score
3.5 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
23 of the 185 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.
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.
1 of the 185 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.