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Gravity (Gravity Series #1) (The Gravity Series)
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From Abigail Boyd
This report was last updated 11/12/2018.
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in Girls & Women with authentic reviews:
Report Card
Fail Overall Grade
FAIL Reviewer Ease
FAIL Word Count Comparison
FAIL Phrase Repetition
FAIL Reviewer Participation
WARN Rating Trend
WARN Suspicious Reviewers
PASS Unverified Purchases
PASS Overlapping Review History
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews
Most Trusted Reviews
I was pleasantly surprised by this book and enjoyed reading ... [Go to full review]
Oct 28, 2012
100%
TRUST
TRUST
- Verified Purchaser
- Overlapping Review History: reviewed 1 of 9 top products
- Critical Reviewer (avg. rating: 3.1)
Least Trusted Reviews
This book is a great read and was very hard ... [Go to full review]
May 17, 2011
0%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (42 words)
- Contains repetitive phrases (show)
- One-Hit Wonder
- Take-Back Reviewer (1 deleted Review; avg. rating: 3.0)
- Overrepresented Participation (posted 1 Review)
- Easy Grader (avg. rating: 5.0)
Analysis Details
Fail 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 4.2. 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.
4.4 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Fail Word Count Comparison
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- 69%
- 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 3 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 272 reviews (or 69%) are within an overrepresented word count group. These reviews have rated this product an average of 4.4, while all other reviews have rated this product an average of 4.1. 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 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
12 reviews
(4.8/5)
(4.8/5)
7 reviews
(4.9/5)
(4.9/5)
14 reviews
(4.7/5)
(4.7/5)
12 reviews
(4.3/5)
(4.3/5)
16 reviews
(4.7/5)
(4.7/5)
5 reviews
(4.8/5)
(4.8/5)
4 reviews
(5.0/5)
(5.0/5)
16 reviews
(3.8/5)
(3.8/5)
12 reviews
(4.9/5)
(4.9/5)
14 reviews
(4.4/5)
(4.4/5)
Common Phrases in Titles:
3 reviews
(4.7/5)
(4.7/5)
4 reviews
(4.8/5)
(4.8/5)
72 of the 394 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.7 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 Reviewer Participation
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- 74%
- 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 293 reviewers (or 74%) are within an overrepresented participation group. These reviews have rated this product an average of 4.4, while all other reviews have rated this product an average of 3.9. 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 Rating Trend
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- 15%
- Created over 17 days
We counted 394 reviews for this product over the span of 2,723 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 17 days exceeding this threshold:In total, we found that 59 reviews were created on just 17 days. Although any days with a larger number of reviews than expected is suspicious, these reviews do not appear to have a significant impact on the overall rating.
Warn Suspicious Reviewers
Take-Back Reviewers
15 of the 394 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 Unverified Purchases
52 of the 394 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 Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
10% also reviewed:
UnEnchanted: An Unfortunate Fairy Tale... by Chanda Hahn
10% also reviewed:
The Hunger Games (Hunger Games Trilogy, Book 1) by Suzanne Collins
6% also reviewed:
The Mind Readers (The Mind Readers Series) by Lori Brighton
6% also reviewed:
Insurgent: Divergent, Book 2 by Veronica Roth
5% also reviewed:
The Fallen Star by Jessica Sorensen
5% also reviewed:
Stained: Stained Series (Volume 1) by Ella James
4% also reviewed:
Open Minds: (Mindjack Series Book 1) by Susan Kaye Quinn
4% also reviewed:
The Deepest Cut (MacKinnon Curse novel Book 1) by J.A. Templeton
115 of the 394 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.
Pass Brand Repeats
Brand Repeaters
32 of the 394 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
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
2 of the 394 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.
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:
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.