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A Sea of Skulls (Arts of Dark and Light Book 2)
More product info From Vox Day

Amazon Reviews for  A Sea of Skulls (Arts of Dark and Light Book 2)
Rating:
100 Ratings
100 Reviews
("Ratings" vs. "Reviews")
7% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card

Top products in War with authentic reviews:


Report Card

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

Most Trusted Reviews

The author has wasted an opportunity. This is a filler ... [Go to full review]
Jan 5, 2017      
100% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
  • Brand Repeater (2 of 125 reviews for this brand; avg rating: 2.0)
  • Overlapping Review History: reviewed 1 of 9 top products
  • Critical Reviewer (avg. rating: 3.4)


Least Trusted Reviews

After reading the prologue I feared this would be a ... [Go to full review]
Jan 3, 2017      
0% TRUST
  • Verified Purchaser
  • Contains repetitive phrases (show)
  • Brand Loyalist (2 of 3 reviews for this brand; avg rating: 4.0)
  • Overlapping Review History: reviewed 1 of 9 top products
  • Overrepresented Participation (posted 3 Reviews)
  • Easy Grader (avg. rating: 4.3)


Analysis Details

Fail Brand Repeats

Brand Loyalists


5 of the 100 reviewers have reviewed multiple products but half or more of their reviews are for this brand. This is an excessively large percentage of Brand Loyalists which may indicate unnatural reviews.

from Brand Loyalists

from Non-Loyalists


4.2
4.7


Brand Monogamists


3 of the 100 reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.

from Brand Monogamists

from Non-Monogamists


4.0
4.7


Read more about our Brand Repeats test.

Warn Rating Trend

  • 13%
  • Created over 4 days

We counted 100 reviews for this product over the span of 991 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.

However, we see the following 4 days exceeding this threshold:In total, we found that 13 reviews were created on just 4 days. Although any days with a larger number of reviews than expected is suspicious, the discrepancy in ratings from reviews created on these high volume days and reviews created on other days isn't significant enough to rule out the possibility of it being due to random chance.

from reviews created on high volume days

from reviews created on normal volume days


4.9
4.6


Read more about our Rating Trend test.

Warn 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 4.4, while the average ease score for reviewers in this category is 4.3. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

4.4 Product's Average Ease Score

4.3 Category's Average Ease Score


4.4
4.3


Read more about our Reviewer Ease 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:
3 reviews
(5.0/5)
16 reviews
(4.9/5)
7 reviews
(5.0/5)
3 reviews
(5.0/5)
3 reviews
(5.0/5)
6 reviews
(4.5/5)
3 reviews
(4.7/5)
3 reviews
(5.0/5)
Show MoreShow Less
Common Phrases in Titles:
2 reviews
(5.0/5)
4 reviews
(5.0/5)
2 reviews
(5.0/5)
2 reviews
(5.0/5)
3 reviews
(5.0/5)
2 reviews
(5.0/5)
2 reviews
(5.0/5)
5 reviews
(5.0/5)
Show MoreShow Less


33 of the 100 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.8
4.6


Read more about our Phrase Repetition test.

Warn Reviewer Participation

  • 90%
  • From reviewers with an overrepresented participation

We see the following 3 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 90 reviewers (or 90%) 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


4.7
4.2


Read more about our Reviewer Participation test.

Pass Unverified Purchases

18 of the 100 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


4.6
4.7


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


3 of the 100 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


4.0
4.7


Never-Verified Reviewers


2 of the 100 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


4.0
4.7


Take-Back Reviewers


16 of the 100 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


4.8
4.6


Single-Day Reviewers

We didn't detect a substantial amount of Single-Day Reviewers.

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

8% also reviewed:
The Corroding Empire by Johan Kalsi

6% also reviewed:
CTRL ALT Revolt! by Nick Cole

5% also reviewed:
Big Boys Don't Cry by Tom Kratman

Does not include products
from the same brand


31 of the 100 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.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.7
4.6


Read more about our Overlapping Review History test.

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.


1 of the 100 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.

from incentivized reviews

from non-incentivized reviews


5.0
4.7


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.