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From Max Krone
This report was last updated 12/28/2021.
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: We only analyze "reviews" and ignore one-tap "ratings".
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Report Card
Fail Overall Grade
FAIL 
Deleted Reviews
Deleted ReviewsFAIL Suspicious Reviewers
Suspicious ReviewersFAIL Phrase Repetition
Phrase RepetitionFAIL Overlapping Review History
Overlapping Review HistoryWARN Reviewer Ease
Reviewer EasePASS Rating Trend
Rating TrendPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized ReviewsN/A Reviewer Participation
Reviewer Participation
Most Trusted Reviews
Als ich auf dieses Buch beim durchstöbern gestoßen bin, wollte ... [Go to full review]
Nov 13, 2020
100%
TRUST
TRUST
-
Verified Purchaser
-
Easy Grader (avg. rating: 4.2)
Take-Back Reviewer (1 deleted Review; avg. rating: 2.0)
Least Trusted Reviews
Es handelt sich um ein Buch mit sehr wenig Text ... [Go to full review]
May 18, 2020
0%
TRUST
TRUST
-
Unverified Purchaser -
Overrepresented word count (67 words)
-
Critical Reviewer (avg. rating: 0.3)
Created on a high volume day
Overlapping Review History: reviewed 2 of 9 top products
Contains repetitive phrases 
Brand Repeater (2 of 194 reviews for this brand; avg rating: 5.0)
Analysis Details
Fail Deleted Reviews
Deleted Reviews
We discovered a total of 39 deleted Reviews for this product, with an average rating of 4.7. 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.
4.7 average rating of deleted reviews
Fail Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
Approximately 60% of reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.
Fail Phrase Repetition
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
~5% of reviews
(5.0/5)
(5.0/5)
~7% of reviews
(3.7/5)
(3.7/5)
~5% of reviews
(5.0/5)
(5.0/5)
~5% of reviews
(5.0/5)
(5.0/5)
~7% of reviews
(4.3/5)
(4.3/5)
~5% of reviews
(5.0/5)
(5.0/5)
~5% of reviews
(4.5/5)
(4.5/5)
~9% of reviews
(4.8/5)
(4.8/5)
~5% of reviews
(5.0/5)
(5.0/5)
~5% of reviews
(5.0/5)
(5.0/5)
Common Phrases in Titles:
~9% of reviews
(4.5/5)
(4.5/5)
~5% of reviews
(5.0/5)
(5.0/5)
~5% of reviews
(4.0/5)
(4.0/5)
Approximately 35% of reviews use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.9 while reviews without substantial repetitive phrases 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 Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
~30% also reviewed:
SMALLTALK - Freunde gewinnen: Wie es Ihnen... by Julius Loewenstein
~30% also reviewed:
Sous Vide Kochbuch: Die 150 besten Rezepte für... by Rezepte Profis
~30% also reviewed:
Ketogene Ernährung Vegetarisch: Vegetarisches... by Rezepte Profis
~30% also reviewed:
Psychologie für Anfänger: Das Buch für die... by William Kaiser
~25% also reviewed:
Intervallfasten: Durch intermittierendes fasten... by Experts, Food
~25% also reviewed:
Kontaktgrill Rezepte: Das Kochbuch mit 150... by Rezepte Profis
~25% also reviewed:
Die Podcast-Offensive: Massenmedium und Online... by Dave Brych
~25% also reviewed:
Kopf schlägt Potenzial: Erfolg ist Kopfsache -... by Dave Brych
~25% also reviewed:
Rhetorik, Smalltalk, Schlagfertigkeit,... by Julius Loewenstein
Approximately 40% of 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 3.6. 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.
Warn Reviewer Ease
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 4.5, while the average ease score for reviewers in this category is 3.9. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.5 Product's Average Ease Score
3.9 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Rating Trend
Rating Trend
-
- <10%
- Created on high-volume days
We didn't notice any signals that would indicate reviews were created unevenly over time.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Unverified Purchases
Unverified Purchases
36 of the 1,316 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 Word Count Comparison
Word Count Comparison
-
- <10%
- 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 Brand Repeats
Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass Incentivized Reviews
Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
-
- <10%
- 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.