Close
Hagakure: The Secret Wisdom of the Samurai
More product info
From Tsunetoma Yamamoto
This report was last updated 3/6/2017.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
View/Edit Adjustment
Jump to Report Card
Report Info:
Last Updated: Mar 6, 2017
Refresh Report
Refresh Report
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Fail Overall Grade
FAIL
Unverified Purchases
![](/public/imgs/reviewmeta/vp-icon.png)
FAIL
Suspicious Reviewers
![](/public/imgs/reviewmeta/su-icon.png)
FAIL
Reviewer Ease
![](/public/imgs/reviewmeta/sc-icon.png)
FAIL
Reviewer Participation
![](/public/imgs/reviewmeta/ex-icon.png)
WARN
Rating Trend
![](/public/imgs/reviewmeta/rt-icon.png)
WARN
Phrase Repetition
![](/public/imgs/reviewmeta/pr-icon.png)
PASS
Word Count Comparison
![](/public/imgs/reviewmeta/wc-icon.png)
PASS
Overlapping Review History
![](/public/imgs/reviewmeta/rh-icon.png)
PASS
Brand Repeats
![](/public/imgs/reviewmeta/re-icon.png)
PASS
Incentivized Reviews
![](/public/imgs/reviewmeta/ic-icon.png)
PASS
Deleted Reviews
![](/public/imgs/reviewmeta/dl-icon.png)
Most Trusted Reviews
Dr. Bennett brings to this work a unique set of ... [Go to full review]
Jun 20, 2014
100%
TRUST
TRUST
-
Verified Purchaser
-
Overlapping Review History: reviewed 1 of 9 top products
-
Critical Reviewer (avg. rating: 4.1)
Least Trusted Reviews
This is by far the best, most accurate and complete, ... [Go to full review]
May 28, 2014
0%
TRUST
TRUST
-
Unverified Purchaser
-
Created on a high volume day
-
Contains repetitive phrases (
show)
-
One-Hit Wonder
-
Never-Verified Reviewer
-
Overrepresented Participation (posted 1 Review)
-
Easy Grader (avg. rating: 5.0)
Analysis Details
Fail
Unverified Purchases
![](/public/imgs/reviewmeta/vp-icon.png)
37 of the 80 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 5.0 while the verified purchasers 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.
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.
Fail
Suspicious Reviewers
![](/public/imgs/reviewmeta/su-icon.png)
One-Hit Wonders
35 of the 80 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 5.0 while the reviewers who have posted more than one review have rated this product an average of 4.8. 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.
Never-Verified Reviewers
35 of the 80 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 5.0 while the reviewers who have written at least one verified purchase review rated this product an average of 4.8. 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.
Take-Back Reviewers
5 of the 80 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.0 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 4.9. 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
Reviewer Ease
![](/public/imgs/reviewmeta/sc-icon.png)
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 4.7, 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.
4.7 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Fail
Reviewer Participation
![](/public/imgs/reviewmeta/ex-icon.png)
-
- 81%
- 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 65 reviewers (or 81%) are within an overrepresented participation group. These reviews have rated this product an average of 5.0, while all other reviews have 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.
Warn
Rating Trend
![](/public/imgs/reviewmeta/rt-icon.png)
-
- 31%
- Created over 3 days
We counted 80 reviews for this product over the span of 924 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.
However, we see the following 3 days exceeding this threshold:In total, we found that 25 reviews were created on just 3 days. This is an excessively high number of reviews submitted on these high volume days.
Warn
Phrase Repetition
![](/public/imgs/reviewmeta/pr-icon.png)
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Reviews:
Show MoreShow Less
4 reviews
3 reviews
2 reviews
4 reviews
2 reviews
2 reviews
3 reviews
2 reviews
3 reviews
22 of the 80 total reviews for this product use substantial repetitive phrases between them. While this is more than we'd expect to see, the discrepancy in ratings between the these reviews and reviews without substantial repetitive phrases isn't significant enough to rule out the possibility of it being due to random chance.
Pass
Word Count Comparison
![](/public/imgs/reviewmeta/wc-icon.png)
-
- 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.
Read more about our Word Count Comparison test.
Pass
Overlapping Review History
![](/public/imgs/reviewmeta/rh-icon.png)
Reviewers of this product have ALSO reviewed the following products:
3% also reviewed:
The Book of Five Rings by Miyamoto Musashi
6 of the 80 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.
Pass
Brand Repeats
![](/public/imgs/reviewmeta/re-icon.png)
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass
Incentivized Reviews
![](/public/imgs/reviewmeta/ic-icon.png)
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.
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
![](/public/imgs/reviewmeta/dl-icon.png)
- 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.