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The Murderer's Daughter: A Novel
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From Jonathan Kellerman
This report was last updated 7/28/2017.
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Last Updated: Jul 28, 2017
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Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in United States with authentic reviews:
Report Card
Warn Overall Grade
FAIL Word Count Comparison
FAIL Overlapping Review History
WARN Rating Trend
WARN Suspicious Reviewers
WARN Reviewer Participation
PASS Unverified Purchases
PASS Phrase Repetition
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews
Most Trusted Reviews
Have been reading Jonathan Kellerman for many years. This one ... [Go to full review]
May 23, 2017
100%
TRUST
TRUST
- Unverified Purchaser
- Take-Back Reviewer (5 deleted Reviews; avg. rating: 4.0)
- Critical Reviewer (avg. rating: 4.0)
Least Trusted Reviews
An ok book but really miss Alex Delaware!!!! [Go to full review]
Sep 7, 2015
30%
TRUST
TRUST
- Verified Purchaser
- Created on a high volume day
- Overrepresented word count (8 words)
- Take-Back Reviewer (52 deleted Reviews; avg. rating: 4.8)
- Overlapping Review History: reviewed 2 of 9 top products
- Easy Grader (avg. rating: 4.6)
Analysis Details
Fail Word Count Comparison
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- 21%
- 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 271 reviews (or 21%) are within an overrepresented word count group. These reviews have rated this product an average of 4.0, while all other reviews have rated this product an average of 3.7. 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
Reviewers of this product have ALSO reviewed the following products:
10% also reviewed:
The Girl on the Train: A Novel by Paula Hawkins
7% also reviewed:
Chapter Ten: Us and Them by Michael Connelly & Terrill Lee Lankford
6% also reviewed:
Rogue Lawyer by Grisham, John(October 20, 2015)... by Random House Audio
6% also reviewed:
Gray Mountain: A Novel by John Grisham
6% also reviewed:
The Burning Room (A Harry Bosch Novel) by Michael Connelly
6% also reviewed:
Make Me: A Jack Reacher Novel by Child, Lee
5% also reviewed:
Gathering Prey by Putnam
5% also reviewed:
The Girl in the Spider's Web: A Lisbeth... by David Lagercrantz
Does not include products
from the same brand
from the same brand
425 of the 1,285 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.0 while the reviewers who have a more unique product review history rated this product an average of 3.7. 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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- 53%
- Created over 42 days
We counted 1,285 reviews for this product over the span of 739 days, an average of 1.7 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 7 or fewer reviews on any given day.
However, we see the following 42 days exceeding this threshold:In total, we found that 678 reviews were created on just 42 days. This is an excessively high number of reviews submitted on these high volume days.
Warn Suspicious Reviewers
Take-Back Reviewers
91 of the 1,285 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 Reviewer Participation
-
- 63%
- 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 805 reviewers (or 63%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
377 of the 1,285 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 Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
138 of the 1,285 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass 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 4.1, while the average ease score for reviewers in this category is 4.2.
4.1 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
58 of the 1,285 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.
33 of the 1,285 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.