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EC Technology Bluetooth 4.1 In-Ear-Kopfhörer Sport Headset mit Mikrofon & Stereo & Magnet...
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From EC TECHNOLOGY
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Report Info:
Last Updated: May 6, 2018
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Note: While Amazon.de claims 434 Ratings, we counted 440 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Warn Overall Grade
FAIL
Deleted Reviews

FAIL
Rating Trend

FAIL
Unverified Purchases

FAIL
Suspicious Reviewers

FAIL
Phrase Repetition

FAIL
Overlapping Review History

PASS
Word Count Comparison

PASS
Reviewer Participation

PASS
Reviewer Ease

PASS
Brand Repeats

PASS
Incentivized Reviews

Most Trusted Reviews
Habe die In Ear Kopfhörer im GYM immer auf.Bei allen ... [Go to full review]
Aug 18, 2017
100%
TRUST
TRUST
-
Verified Purchaser
-
Easy Grader (avg. rating: 4.9)
Least Trusted Reviews
"Ich hätte niemals eine so gute Qualität für den Preis ... [Go to full review]
Dec 5, 2016
0%
TRUST
TRUST
-
Unverified Purchaser
-
Contains repetitive phrases (
show)
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Never-Verified Reviewer
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Single-Day Reviewer (posted all reviews on Dec 5, 2016)
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Easy Grader (avg. rating: 5.0)
Analysis Details
Fail
Deleted Reviews

We discovered a total of 42 deleted Reviews for this product, with an average rating of 4.9. 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
Rating Trend

-
- 1%
- Created over 1 day
We counted 440 reviews for this product over the span of 838 days, an average of 0.5 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 4 or fewer reviews on any given day.
However, we see the following 1 day exceeding this threshold:In total, we found that 5 reviews were created on just 1 day. The reviews on these high volume days have rated this product an average of 5.0 while reviews from other days 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
Unverified Purchases

100 of the 440 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.4 while the verified purchasers have rated this product an average of 3.4. 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
82 of the 440 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, it does not appear to have a significant impact on the overall rating.
Never-Verified Reviewers
27 of the 440 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 4.3 while the reviewers who have written at least one verified purchase review 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.
Take-Back Reviewers
59 of the 440 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 4.5 while the reviewers who don't have any deleted reviews in their history have 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.
Single-Day Reviewers
24 of the 440 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 4.5 while all other reviewers 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
6 reviews
4 reviews
76 reviews
39 reviews
53 reviews
4 reviews
20 reviews
14 reviews
16 reviews
215 of the 440 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 3.9 while reviews without substantial repetitive phrases rated this product an average of 3.4. 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:
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3% also reviewed:
MEMTEQ Bluetooth Lautsprecher-Musikbox LED... by MEMTEQ
3% also reviewed:
Tchibo Cafissimo Classic Kapselmaschine (die... by Tchibo
3% also reviewed:
Tchibo Saeco Cafissimo Latte Kaffeemaschine, Rosso by Tchibo
3% also reviewed:
Fire TV Stick, Zertifiziert und generalüberholt by Amazon Renewed
3% also reviewed:
Externer Akku, Swees® 20000mAh Dual USB Ausgang... by Swees
3% also reviewed:
Wicked Chili Dual Ladegerät/Ladeschale für... by Wicked Chili
Does not include products
from the same brand
from the same brand
47 of the 440 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.6 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.
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 3.9, while the average ease score for reviewers in this category is 4.1.
3.9 Product's Average Ease Score
4.1 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass
Brand Repeats

Brand Repeaters
14 of the 440 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.
2 of the 440 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.