The Demon Crown: A Sigma Force Novel (Sigma Force Novels)
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From James Rollins
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Most Trusted Reviews
TRUST
- Verified Purchaser
- Take-Back Reviewer (6 deleted Reviews; avg. rating: 3.3)
- Brand Repeater (3 of 216 reviews for this brand; avg rating: 3.3)
- Overlapping Review History: reviewed 1 of 9 top products
- Critical Reviewer (avg. rating: 3.4)
Least Trusted Reviews
TRUST
- Verified Purchaser
- Contains repetitive phrases (show)
- Brand Repeater (2 of 8 reviews for this brand; avg rating: 5.0)
- Overrepresented Participation (posted 8 Reviews)
- Easy Grader (avg. rating: 4.8)
Analysis Details
Never-Verified Reviewers
2 of the 116 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.0 while the reviewers who have written at least one verified purchase review rated this product an average of 4.8. 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
19 of the 116 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.
42 of the 116 total reviews for this product 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 4.6. 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.
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- 16%
- Created over 2 days
We counted 116 reviews for this product over the span of 62 days, an average of 1.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 8 or fewer reviews on any given day.
However, we see the following 2 days exceeding this threshold:In total, we found that 18 reviews were created on just 2 days. This is an excessively high number of reviews submitted on these high volume days.
Brand Loyalists
3 of the 116 reviewers have reviewed multiple products but half or more of their reviews are for this brand. While this is more Brand Loyalists than we'd expect to see, the discrepancy in ratings between the Brand Loyalists and non-loyalists isn't significant enough to rule out the possibility of it being due to random chance.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
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- 55%
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 64 reviewers (or 55%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
17 of the 116 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.
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- 27%
- 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 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 31 reviews (or 27%) are within an overrepresented word count group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
11% also reviewed:
The Sixth Extinction (Sigma Force) by James Rollins
9% also reviewed:
The Eye of God (Sigma Force) by Brand: William Morrow
9% also reviewed:
The Lincoln Myth: A Novel (Cotton Malone Book 9) by Steve Berry
9% also reviewed:
Crimson Shore (Pendergast Series Book 15) by Douglas Preston
8% also reviewed:
Bloodline: A Sigma Force Novel by Rollins, James
8% also reviewed:
War Hawk: A Tucker Wayne Novel by William Morrow
8% also reviewed:
The 14th Colony: A Novel (Cotton Malone) by Steve Berry
8% also reviewed:
Beyond the Ice Limit - EXTENDED FREE PREVIEW... by Douglas Preston
8% also reviewed:
The Martian: Classroom Edition: A Novel by Andy Weir
37 of the 116 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.
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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
- 0
- Reviews have been deleted
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.