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Pandemic (The Extinction Files Book 1)
More product info
From A.G. Riddle
This report was last updated 6/13/2020.
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.com claims 3,377 Ratings, we counted 3,378 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
Unverified PurchasesFAIL Phrase Repetition
Phrase RepetitionFAIL Overlapping Review History
Overlapping Review HistoryWARN Deleted Reviews
Deleted ReviewsWARN Rating Trend
Rating TrendWARN Suspicious Reviewers
Suspicious ReviewersPASS Word Count Comparison
Word Count ComparisonPASS Reviewer Participation
Reviewer ParticipationPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized Reviews
Most Trusted Reviews
It is certainly complicated. Each time I thought I knew ... [Go to full review]
Feb 1, 2020
100%
TRUST
TRUST
-
Verified Purchaser
-
Brand Repeater (2 of 27 reviews for this brand; avg rating: 5.0) -
Easy Grader (avg. rating: 4.6)
Critical Reviewer (avg. rating: 3.8)
Least Trusted Reviews
This book was riveting to the very end. I can't ... [Go to full review]
May 14, 2017
0%
TRUST
TRUST
-
Unverified Purchaser -
Created on a high volume day -
Contains repetitive phrases (
show)
-
Take-Back Reviewer (2 deleted Reviews; avg. rating: 5.0) -
Overlapping Review History: reviewed 1 of 9 top products -
Easy Grader (avg. rating: 4.8)
Analysis Details
Fail Unverified Purchases
Unverified Purchases
1,791 of the 3,378 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.4 while the verified purchasers have rated this product an average of 4.2. 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 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
96 reviews
(4.9/5)
(4.9/5)
86 reviews
(4.6/5)
(4.6/5)
88 reviews
(4.9/5)
(4.9/5)
69 reviews
(4.8/5)
(4.8/5)
104 reviews
(4.6/5)
(4.6/5)
49 reviews
(4.7/5)
(4.7/5)
44 reviews
(4.8/5)
(4.8/5)
84 reviews
(4.6/5)
(4.6/5)
64 reviews
(4.9/5)
(4.9/5)
61 reviews
(4.9/5)
(4.9/5)
Common Phrases in Titles:
23 reviews
(5.0/5)
(5.0/5)
481 of the 3,378 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.8 while reviews without substantial repetitive phrases rated this product an average of 4.2. 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:
5% also reviewed:
Departure by A. G. Riddle
5% also reviewed:
Breakthrough by Michael C. Grumley
4% also reviewed:
CyberStorm: A Novel by Matthew Mather
3% also reviewed:
Werkryt MFi Certified iPhone Charger Lightning... by Werkryt
3% also reviewed:
Split Second (Split Second Book 1) by Douglas E. Richards
3% also reviewed:
Ripple (Breakthrough Book 4) by Michael C. Grumley
3% also reviewed:
Wool by Hugh Howey
3% also reviewed:
Leap by Michael C. Grumley
3% also reviewed:
The Naturalist: The Naturalist, Book 1 by Andrew Mayne
672 of the 3,378 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.5 while the reviewers who have a more unique product review history rated this product an average of 4.3. 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
Deleted Reviews
We discovered a total of 55 deleted Reviews for this product, with an average rating of 4.5. 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.
4.5 average rating of deleted reviews
Warn Rating Trend
Rating Trend
-
- 34%
- Created over 67 days
We counted 3,378 reviews for this product over the span of 1,163 days, an average of 2.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 10 or fewer reviews on any given day.
However, we see the following 67 days exceeding this threshold:In total, we found that 1,135 reviews were created on just 67 days. This is an excessively high number of reviews submitted on these high volume days.
Warn Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
898 of the 3,378 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, it does not appear to have a significant impact on the overall rating.
Pass Word Count Comparison
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.
Read more about our Word Count Comparison test.
Pass Reviewer Participation
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
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 4.3, while the average ease score for reviewers in this category is 4.3.
4.3 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
596 of the 3,378 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
Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
1 of the 3,378 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. 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 Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.