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JBL ProScan 25420 Wassertest mit Smartphoneauswertung für Süßwasser Aquarien
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From JBL
This report was last updated 8/4/2021.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: While Amazon.de claims 3,097 Ratings, we counted 354 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
Fail Overall Grade
FAIL Unverified Purchases
FAIL Suspicious Reviewers
FAIL Word Count Comparison
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Phrase Repetition
PASS Rating Trend
PASS Reviewer Participation
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
Das Produkt funtioniert am Anfang gut, aber nach 10 Teststreifen ... [Go to full review]
Aug 13, 2019
100%
TRUST
TRUST
- Verified Purchaser
- Critical Reviewer (avg. rating: 2.6)
Least Trusted Reviews
das die Messung nicht so genau sind wurde ja schon ... [Go to full review]
Jun 4, 2017
0%
TRUST
TRUST
- Unverified Purchaser
- One-Hit Wonder
- Never-Verified Reviewer
- Critical Reviewer (avg. rating: 1.0)
Analysis Details
Fail Unverified Purchases
58 of the 354 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 2.4 while the verified purchasers 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.
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
18 of the 354 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 2.0 while the reviewers who have posted more than one review 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.
Never-Verified Reviewers
14 of the 354 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 2.6 while the reviewers who have written at least one verified purchase review 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.
Take-Back Reviewers
94 of the 354 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 3.8 while the reviewers who don't have any deleted reviews in their history have 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 Word Count Comparison
-
- 27%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 2 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 95 reviews (or 27%) are within an overrepresented word count group. These reviews have rated this product an average of 4.2, while all other reviews 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.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
4% also reviewed:
Tetra Aquarium Außenfilter EX Plus -... by Tetra
3% also reviewed:
Amazon Echo Dot (2. Gen.) Intelligenter... by Amazon
3% also reviewed:
Easy Life Pro Fito professionelle &... by Easy Life
2% also reviewed:
Amazon Echo (2. Gen.), Intelligenter Lautsprecher... by Amazon
2% also reviewed:
Echo Dot (3. Gen.), Anthrazit Stoff + Ledvance... by Amazon
2% also reviewed:
Fire TV Stick 4K Ultra HD mit... by Amazon
2% also reviewed:
Juwel Aquarium 85145 OxyPlus O2 Diffusor by Juwel Aquarium
2% also reviewed:
Fire TV Stick mit Alexa-Sprachfernbedienung (1.... by Amazon
Does not include products
from the same brand
from the same brand
58 of the 354 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 3.9 while the reviewers who have a more unique product review history 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.
Warn Deleted Reviews
We discovered a total of 9 deleted Reviews for this product, with an average rating of 4.2. 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.
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:
Show MoreShow Less
2 reviews
(5.0/5)
(5.0/5)
3 reviews
(5.0/5)
(5.0/5)
13 reviews
(2.9/5)
(2.9/5)
2 reviews
(5.0/5)
(5.0/5)
10 reviews
(1.1/5)
(1.1/5)
2 reviews
(5.0/5)
(5.0/5)
2 reviews
(5.0/5)
(5.0/5)
7 reviews
(2.7/5)
(2.7/5)
2 reviews
(5.0/5)
(5.0/5)
38 of the 354 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
-
- 3%
- Created over 4 days
We counted 354 reviews for this product over the span of 2,401 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.
However, we see the following 4 days exceeding this threshold:In total, we found that 12 reviews were created on just 4 days. 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 3.9, while the average ease score for reviewers in this category is 3.9.
3.9 Product's Average Ease Score
3.9 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
85 of the 354 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.
-
- 0%
- Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.