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Quiet: The Power of Introverts in a World That Can't Stop Talking From Susan Cain Report Feedback

Pass Reviews appear natural

Original:

5,453 Reviews

Adjusted:

4,693 Reviews

75%
79%

View/Edit Adjustment
How is this calculated
Report Last Updated: Jun 18, 2018
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Report Card

Click a test to jump to details

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

This book has great insights into introverts and extroverts, and ... [Go to full review]
Apr 28, 2018      
100% TRUST
  • Verified Purchaser
  • Overlapping Review History: reviewed 1 of 9 top products
  • Critical Reviewer (avg. rating: 4.1)


Least Trusted Reviews

The author combines anecdotes with research to make a case ... [Go to full review]
Dec 26, 2013      
20% TRUST
  • Unverified Purchaser
  • Created on a high volume day
  • One-Hit Wonder
  • Never-Verified Reviewer
  • Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
  • Overrepresented Participation (posted 1 review)
  • Easy Grader (avg. rating: 5.0)


Analysis Details


Warn Deleted Reviews

We discovered a total of 80 deleted reviews for this product, with an average rating of 4.6. 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.

4.6 average rating of deleted reviews

4.6



Read more about our Deleted Reviews test.

Warn Suspicious Reviewers

One-Hit Wonders


668 of the 5,453 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, the discrepancy in ratings between the One-Hit Wonders and reviewers who have posted more than one review isn't significant enough to rule out the possibility of it being due to random chance.

from one-hit wonders

from reviewers with more than one review


4.6
4.5


Take-Back Reviewers


390 of the 5,453 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


4.4
4.5


Read more about our Suspicious Reviewers test.

Warn Reviewer Participation

  • 65%
  • 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 3533 reviewers (or 65%) 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


4.5
4.4


Read more about our Reviewer Participation test.

Pass Rating Trend

  • 3%
  • Created over 15 days

We counted 5,453 reviews for this product over the span of 2,437 days, an average of 2.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 9 or fewer reviews on any given day.

However, we see the following 15 days exceeding this threshold:In total, we found that 174 reviews were created on just 15 days. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviews created on high volume days

from reviews created on normal volume days


4.5
4.5


Read more about our Rating Trend test.

Pass Unverified Purchases

1,026 of the 5,453 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


4.3
4.5


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 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:
342 reviews
(4.6/5)
252 reviews
(4.5/5)
415 reviews
(4.5/5)
219 reviews
(4.6/5)
117 reviews
(4.7/5)
221 reviews
(4.7/5)
140 reviews
(4.5/5)
Show MoreShow Less
Common Phrases in Titles:
56 reviews
(4.8/5)
135 reviews
(4.9/5)


668 of the 5,453 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.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.6
4.5


Read more about our Phrase Repetition test.

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

2% also reviewed:
Gone Girl: A Novel by Gillian Flynn

2% also reviewed:
The Fault in Our Stars by John Green

2% also reviewed:
Unbroken by Laura Hillenbrand

Does not include products
from the same brand


573 of the 5,453 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


4.3
4.5


Read more about our Overlapping Review History test.

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 4.3, 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


4.3
4.3


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


29 of the 5,453 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


4.5
4.5


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.


34 of the 5,453 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


4.6
4.5


Read more about our Incentivized Reviews test, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.