Quiet: The Power of Introverts in a World That Can't Stop Talking From Susan Cain Report Feedback
Last Updated: 2/15/2017
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Most Trusted Reviews
- Verified Purchaser
- Critical Reviewer (avg. rating: 3.3)
Least Trusted Reviews
- Verified Purchaser
- Created on a high volume day
- Single-Day Reviewer (posted all reviews on Mar 31, 2013)
- Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
- Overrepresented Participation (posted 2 reviews)
- Easy Grader (avg. rating: 5.0)
542 of the 4,980 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.
250 of the 4,980 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 4.7 while all other reviewers rated this product an average of 4.5. 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.
4.3 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
We discovered a total of 11 deleted reviews for this product, with an average rating of 4.8. 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.
4.8 average rating of deleted reviews
Read more about our Deleted Reviews test.
- 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:
- Created over 16 days
We counted 4,980 reviews for this product over the span of 1,956 days, an average of 2.5 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 16 days exceeding this threshold:
957 of the 4,980 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.
- Have an overrepresented word count
Read more about our Word Count Comparison test.
605 of the 4,980 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.
452 of the 4,980 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.
14 of the 4,980 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.
4.0 average net helpfulness for positive reviews
3.1 average net helpfulness for negative reviews
Read more about our Skewed Helpfulness test.
34 of the 4,980 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, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.