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Tevigo 90690 Luftreiniger Ionisierer für Allergiker und Raucher
More product info From Tevigo

0% of potentially unnatural reviews removed (why?)
Adjusted:
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Report Card

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

Most Trusted Reviews

5/5
Ein gutes Gerät, lautlos, gute Luft und leicht zu reinigen. [Go to full review]
Jan 24, 2020      
100% TRUST
  • Verified Purchaser
  • Easy Grader (avg. rating: 4.7)


Least Trusted Reviews

Luftreiniger wurde von mir mit einiger Skepsis bestellt. Bin positiv ... [Go to full review]
Mar 22, 2013      
32% TRUST
  • Verified Purchaser
  • Contains repetitive phrases (show)
  • Overlapping Review History: reviewed 1 of 9 top products
  • Easy Grader (avg. rating: 4.6)


Analysis Details

Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

Does not include products
from the same brand


45 of the 726 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 3.7. 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.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.2
3.7


Read more about our Overlapping Review History test.

Warn Deleted Reviews

We discovered a total of 26 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:
  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.

4.2 average rating of deleted reviews

4.2


Show distribution of deleted reviews

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:
14 reviews
(4.6/5)
10 reviews
(3.4/5)
33 reviews
(3.6/5)
19 reviews
(4.4/5)
24 reviews
(4.8/5)
7 reviews
(3.9/5)
16 reviews
(3.8/5)
10 reviews
(4.0/5)
13 reviews
(4.8/5)
Show MoreShow Less
Common Phrases in Titles:
63 reviews
(4.2/5)
7 reviews
(5.0/5)
4 reviews
(5.0/5)
9 reviews
(4.8/5)
10 reviews
(4.9/5)
7 reviews
(4.9/5)
Show MoreShow Less


124 of the 726 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


3.9
3.7


Read more about our Phrase Repetition test.

Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 726 reviews for this product over the span of 2,703 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

25 of the 726 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


3.8
3.8


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 Suspicious Reviewers

One-Hit Wonders


35 of the 726 reviewers have only reviewed this product. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from one-hit wonders

from reviewers with more than one review


3.1
3.8


Never-Verified Reviewers


5 of the 726 reviewers have never written a verified purchase review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from never-verified reviewers

from reviewers with at least one verified purchase review


4.4
3.8


Take-Back Reviewers


133 of the 726 reviewers have had at least one of their past reviews for another product deleted. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from take-back reviewers

from reviewers without previously deleted reviews


3.6
3.8


Single-Day Reviewers


24 of the 726 reviewers have written multiple reviews but posted all of them on a single day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from single-day reviewers

from non-single-day reviewers


3.9
3.7


Read more about our Suspicious Reviewers 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.

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 4.1, while the average ease score for reviewers in this category is 4.2.

4.1 Product's Average Ease Score

4.2 Category's Average Ease Score


4.1
4.2


Read more about our Reviewer Ease 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.