Close
arteesol Gymnastikball, Balance Ball 45cm/55cm/65cm/75cm Yoga Ball mit Pumpe Anti-Burst Fitness...
More product info
From arteesol
This report was last updated 4/11/2021.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
View/Edit Adjustment
Jump to Report Card
Report Info:
Note: While Amazon.de claims 4,116 Ratings, we counted 502 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
Rating Trend

FAIL
Suspicious Reviewers

FAIL
Word Count Comparison

FAIL
Phrase Repetition

FAIL
Overlapping Review History

WARN
Brand Repeats

PASS
Unverified Purchases

PASS
Reviewer Participation

PASS
Reviewer Ease

PASS
Incentivized Reviews

PASS
Deleted Reviews

Most Trusted Reviews
Der Gymnastikball ist für meine Frau.Er war einfach aufzupumpen und ... [Go to full review]
Jun 6, 2020
100%
TRUST
TRUST
-
Verified Purchaser
-
Take-Back Reviewer (4 deleted Reviews; avg. rating: 4.3)
-
Critical Reviewer (avg. rating: 3.3)
Least Trusted Reviews
Ein super stabiler Gymnastikball in einer Klassen kräftigen Farbe.Dank der ... [Go to full review]
Aug 15, 2019
0%
TRUST
TRUST
-
Verified Purchaser
-
Created on a high volume day
-
Contains repetitive phrases (
show)
-
Take-Back Reviewer (24 deleted Reviews; avg. rating: 4.5)
-
Brand Repeater (2 of 558 reviews for this brand; avg rating: 5.0)
-
Overlapping Review History: reviewed 1 of 9 top products
-
Easy Grader (avg. rating: 4.0)
Analysis Details
Fail
Rating Trend

-
- 4%
- Created over 4 days
We counted 502 reviews for this product over the span of 912 days, an average of 0.6 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 4 days exceeding this threshold:In total, we found that 22 reviews were created on just 4 days. The reviews on these high volume days have rated this product an average of 4.6 while reviews from other days have rated this product an average of 3.9. 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
Suspicious Reviewers

One-Hit Wonders
32 of the 502 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 2.5 while the reviewers who have posted more than one review have rated this product an average of 4.1. 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.
Take-Back Reviewers
252 of the 502 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 4.2 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 3.7. 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
14 of the 502 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 4.7 while all other reviewers rated this product an average of 3.9. 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

-
- 28%
- 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 140 reviews (or 28%) 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 3.9. 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
8 reviews
(4.3/5)
(4.3/5)
8 reviews
(4.6/5)
(4.6/5)
17 reviews
(4.4/5)
(4.4/5)
15 reviews
(4.3/5)
(4.3/5)
14 reviews
(4.8/5)
(4.8/5)
6 reviews
(3.8/5)
(3.8/5)
6 reviews
(3.7/5)
(3.7/5)
16 reviews
(4.4/5)
(4.4/5)
13 reviews
(4.0/5)
(4.0/5)
10 reviews
(4.5/5)
(4.5/5)
147 of the 502 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.2 while reviews without substantial repetitive phrases rated this product an average of 3.9. 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:
27% also reviewed:
BoxLegend Wäschenetze Wäschebeutel Wäschesack... by BoxLegend
21% also reviewed:
Duracell Ultra 9V Block Alkaline Batterien 6LR61,... by Duracell
18% also reviewed:
Ti Ora Tee, Schwarzer Tee mit Manuka Honig, 4er... by TI ORA
17% also reviewed:
Brabantia 113741 Treteimer mit Inneneimer aus... by Brabantia
15% also reviewed:
Pfanni Kartoffel Snack ideal für zwischendurch... by Pfanni
14% also reviewed:
Hidrofugal Duschgel Dusch Frische im 6er Pack (6x... by Hidrofugal
151 of the 502 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.2 while the reviewers who have a more unique product review history rated this product an average of 3.9. 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
Brand Repeats

Brand Repeaters
141 of the 502 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.
Pass
Unverified Purchases

3 of the 502 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
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.
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 4.2, while the average ease score for reviewers in this category is 3.7. 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
3.7 Category's Average Ease Score
Read more about our Reviewer Ease test.
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.
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.