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From Octavia E. Butler
This report was last updated 7/28/2023.
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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Note: We only analyze "reviews" and ignore one-tap "ratings".
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Report Card
Pass Overall Grade
FAIL 
Deleted Reviews
Deleted ReviewsWARN Rating Trend
Rating TrendWARN Suspicious Reviewers
Suspicious ReviewersWARN Phrase Repetition
Phrase RepetitionPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Overlapping Review History
Overlapping Review HistoryPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized ReviewsN/A Reviewer Participation
Reviewer Participation
Most Trusted Reviews
Octavia Butler wrote a variety of very good, very unusual ... [Go to full review]
Jun 15, 2023
100%
TRUST
TRUST
-
Verified Purchaser
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Easy Grader (avg. rating: 4.5)
Brand Repeater (2 of 41 reviews for this brand; avg rating: 5.0)
Overlapping Review History: reviewed 1 of 9 top products
Unverified Purchaser
Least Trusted Reviews
I felt so much reading this book. I can't stop ... [Go to full review]
Jun 23, 2023
8%
TRUST
TRUST
-
Verified Purchaser
-
Created on a high volume day -
Contains repetitive phrases (show)
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Take-Back Reviewer (1 deleted Review; avg. rating: 1.0) -
Critical Reviewer (avg. rating: 3.3)
Overrepresented Participation (posted 13 Reviews)
Analysis Details
Fail Deleted Reviews
Deleted Reviews
We discovered a total of 28 deleted Reviews for this product, with an average rating of 4.4. 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.
4.4 average rating of deleted reviews
Warn Rating Trend
Rating Trend
It appears that several reviews were created during just a short period of time.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Warn Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
Approximately 25% of 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.
Warn 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
~7% of reviews
(5.0/5)
(5.0/5)
~7% of reviews
(5.0/5)
(5.0/5)
~7% of reviews
(4.0/5)
(4.0/5)
~7% of reviews
(5.0/5)
(5.0/5)
Approximately 85% of reviews use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.
Pass Unverified Purchases
Unverified Purchases
525 of the 18,790 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
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- <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 Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
<10% also reviewed:
The Handmaid's Tale (Movie Tie-in) by Margaret Atwood
<10% also reviewed:
The Road by Vintage Books
<10% also reviewed:
The Absolutely True Diary of a Part-Time Indian by Sherman Alexie
<10% also reviewed:
Before We Were Yours: A Novel by Lisa Wingate
<10% also reviewed:
Harry Potter and the Cursed Child, Parts One and... by J. K. Rowling
<10% also reviewed:
Little Bee: A Novel by Simon & Schuster
<10% also reviewed:
The Shadow of the Wind by Jonathan Davis
<10% also reviewed:
Amazon Prime Video by Amazon.com
<10% also reviewed:
Jane Eyre (AmazonClassics Edition) by Charlotte Brontë
Approximately 15% of 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 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
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.
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- <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.