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Ghosts
More product info From Raina Telgemeier

Amazon Reviews for  Ghosts
Rating:
572 Ratings
572 Reviews
("Ratings" vs. "Reviews")
53% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card

Report Card

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

Most Trusted Reviews

This book has a lot of interesting and unique elements ... [Go to full review]
Feb 16, 2017      
100% TRUST
  • Unverified Purchaser
  • Take-Back Reviewer (155 deleted Reviews; avg. rating: 4.1)
  • Brand Repeater (16 of 3172 reviews for this brand; avg rating: 4.8)
  • Overlapping Review History: reviewed 3 of 9 top products
  • Critical Reviewer (avg. rating: 4.1)


Least Trusted Reviews

Any book that hooks my 10 year old reluctant reader ... [Go to full review]
Nov 13, 2016      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Contains repetitive phrases (show)
  • Overrepresented Participation (posted 7 Reviews)
  • Critical Reviewer (avg. rating: 4.0)


Analysis Details

Fail Rating Trend

  • 8%
  • Created over 7 days

We counted 572 reviews for this product over the span of 693 days, an average of 0.8 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 5 or fewer reviews on any given day.

However, we see the following 7 days exceeding this threshold:In total, we found that 48 reviews were created on just 7 days. The reviews on these high volume days have rated this product an average of 4.9 while reviews from other days have rated this product an average of 4.7. 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.

from reviews created on high volume days

from reviews created on normal volume days


4.9
4.7


Read more about our Rating Trend test.

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 4.3. 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

4.3 Category's Average Ease Score


4.4
4.3


Read more about our Reviewer Ease test.


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:
16 reviews
(4.3/5)
9 reviews
(4.8/5)
26 reviews
(5.0/5)
14 reviews
(4.9/5)
22 reviews
(4.9/5)
6 reviews
(4.3/5)
5 reviews
(4.4/5)
11 reviews
(4.7/5)
14 reviews
(4.9/5)
5 reviews
(4.8/5)
Show MoreShow Less
Common Phrases in Titles:
11 reviews
(4.8/5)


84 of the 572 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 4.7. 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.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.9
4.7


Read more about our Phrase Repetition test.

Warn Suspicious Reviewers

Take-Back Reviewers


50 of the 572 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.

from take-back reviewers

from reviewers without previously deleted reviews


4.7
4.8


Read more about our Suspicious Reviewers test.

Warn Word Count Comparison

  • 42%
  • 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 2 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 242 reviews (or 42%) are within an overrepresented word count group. While this is more reviews from overrepresented word count groups than we'd expect to see, the discrepancy in ratings between reviews with overrepresented word groups and all other reviews isn’t significant enough to rule out the possibility of it being due to random chance.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.8
4.7


Read more about our Word Count Comparison test.

Warn Reviewer Participation

  • 68%
  • 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 388 reviewers (or 68%) 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
4.8


Read more about our Reviewer Participation test.

Pass Unverified Purchases

152 of the 572 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
4.8


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:

5% also reviewed:
Drama by Raina Telgemeier

3% also reviewed:
Wonder by R. J. Palacio

2% also reviewed:
Roller Girl by Jamieson, Victoria

2% also reviewed:
El Deafo by Cece Bell

Does not include products
from the same brand


81 of the 572 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


4.6
4.8


Read more about our Overlapping Review History test.

Pass Brand Repeats

Brand Repeaters


14 of the 572 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.

from Brand Repeaters

from Non-Repeaters


4.8
4.8


Read more about our Brand Repeats 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.

  • 0%
  • 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.

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.