The 7 Habits of Highly Effective People: 30th Anniversary Edition
More product info
From Stephen R. Covey
Refresh the report to view the most up-to-date data available:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
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Most Trusted Reviews
TRUST
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Verified Purchaser
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Take-Back Reviewer (4 deleted Reviews; avg. rating: 4.8)
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Easy Grader (avg. rating: 4.0)
Least Trusted Reviews
TRUST
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Unverified Purchaser
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Created on a high volume day
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Overrepresented word count (0 words)
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One-Hit Wonder
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Never-Verified Reviewer
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Overrepresented Participation (posted 1 Review)
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Easy Grader (avg. rating: 5.0)
Analysis Details
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One-Hit Wonders
68 of the 174 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.
Never-Verified Reviewers
72 of the 174 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.
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8% also reviewed:
How To Win Friends and Influence People (English... by Dale Carnegie
7% also reviewed:
Think and Grow Rich: The 21st Century Edition by Napoleon Hill
5% also reviewed:
Rich Dad Poor Dad: What the Rich Teach Their Kids... by Robert T. Kiyosaki
5% also reviewed:
Item Unavailable by
5% also reviewed:
Pride and Prejudice (English Edition) by Jane Austen
4% also reviewed:
Tuesdays with Morrie by Albom, Mitch
3% also reviewed:
Cornelsen Senior English Library - Literatur: Ab... by Mark Haddon
3% also reviewed:
Outliers: The Story of Success (English Edition) by Malcolm Gladwell
from the same brand
24 of the 174 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.8 while the reviewers who have a more unique product review history rated this product an average of 4.2. 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.
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- 7%
- Created over 6 days
We counted 174 reviews for this product over the span of 8,628 days, an average of 0.0 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 1 or fewer reviews on any given day.
However, we see the following 6 days exceeding this threshold:In total, we found that 12 reviews were created on just 6 days. Although any days with a larger number of reviews than expected is suspicious, the discrepancy in ratings from reviews created on these high volume days and reviews created on other days isn't significant enough to rule out the possibility of it being due to random chance.
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- 72%
- 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 125 reviews (or 72%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
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- 57%
- From reviewers with an overrepresented participation
We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 99 reviewers (or 57%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
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81 of the 174 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.
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4 of the 174 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.
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4.2 Product's Average Ease Score
3.9 Category's Average Ease Score
Read more about our Reviewer Ease test.
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Brand Repeaters
5 of the 174 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.
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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
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- 0
- Reviews have been deleted
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.