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Karvipark Heizlüfter, Mini Heizlüfter Keramik Energiesparend Elektroheizer 250W, 2s...
More product info From Karvipark

Amazon Reviews for  Karvipark Heizlüfter, Mini Heizlüfter Keramik Energiesparend Elektroheizer 250W, 2s Schnellheitzer Abschaltautomatik Überhitzungschutz für Babyzimmer Hause Büro
Rating:
20 Ratings
20 Reviews
("Ratings" vs. "Reviews")
55% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card

Report Card

Fail Overall Grade
FAIL Reviewer Ease
WARN Suspicious Reviewers
WARN Phrase Repetition
WARN Reviewer Participation
PASS Rating Trend
PASS Unverified Purchases
PASS Word Count Comparison
PASS Overlapping Review History
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews

Most Trusted Reviews

Wärmt gut. Nimmt wenig Platz weg. Die ersten paar mal ... [Go to full review]
Nov 19, 2018      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 3.0)


Least Trusted Reviews

Die Heizung Heizt den Raum innerhalb kürzester Zeit. Zudem sieht ... [Go to full review]
Nov 1, 2018      
27% TRUST
  • Verified Purchaser
  • Contains repetitive phrases (show)
  • Take-Back Reviewer (9 deleted Reviews; avg. rating: 4.1)
  • Overrepresented Participation (posted 35 Reviews)
  • Easy Grader (avg. rating: 4.7)


Analysis Details

Fail 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 4.8, while the average ease score for reviewers in this category is 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.

4.8 Product's Average Ease Score

4.1 Category's Average Ease Score


4.8
4.1


Read more about our Reviewer Ease test.


Warn Suspicious Reviewers

Take-Back Reviewers


1 of the 20 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.

from take-back reviewers

from reviewers without previously deleted reviews


5.0
4.5


Read more about our Suspicious Reviewers test.

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:
4 reviews
(5.0/5)
2 reviews
(5.0/5)
2 reviews
(5.0/5)
2 reviews
(3.0/5)
3 reviews
(5.0/5)
Show MoreShow Less
Common Phrases in Titles:
2 reviews
(5.0/5)
2 reviews
(5.0/5)


5 of the 20 total reviews for this product use substantial repetitive phrases between them. While this is more than we'd expect to see, the discrepancy in ratings between the these reviews and reviews without substantial repetitive phrases isn't significant enough to rule out the possibility of it being due to random chance.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


5.0
4.3


Read more about our Phrase Repetition test.

Warn Reviewer Participation

  • 70%
  • From reviewers with an overrepresented participation

We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 14 reviewers (or 70%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.4
4.8


Read more about our Reviewer Participation test.

Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 20 reviews for this product over the span of 64 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. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.

Pass Unverified Purchases

1 of the 20 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.

from unverified purchasers

from verified purchases


5.0
4.5


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 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.

Pass Overlapping Review History
  • 0%
  • Substantial overlapping review history
0 of the 20 reviewers have substantial overlapping product review history. 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 Overlapping Review History test.

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.

  • 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.

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:
  1. 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.
  2. We have no information on reviews that were never published in the first place.
  3. 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.
Read more about our Deleted Reviews test.