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RECOGNITION: Oxygen Debt, Part 1
More product info
From Mark Dowson
This report was last updated 3/1/2021.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: While Amazon.co.uk claims 16 Ratings, we counted 15 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Fail Overall Grade
FAIL
Suspicious Reviewers

WARN
Reviewer Ease

WARN
Word Count Comparison

WARN
Phrase Repetition

WARN
Reviewer Participation

PASS
Rating Trend

PASS
Unverified Purchases

PASS
Overlapping Review History

PASS
Brand Repeats

PASS
Incentivized Reviews

PASS
Deleted Reviews

Most Trusted Reviews
We couldn't find any quality reviews
Least Trusted Reviews
Well worth reading. Great plot, interesting observations and a new ... [Go to full review]
May 22, 2020
32%
TRUST
TRUST
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Verified Purchaser
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Overrepresented word count (21 words)
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Contains repetitive phrases (
show)
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Overrepresented Participation (posted 9 Reviews)
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Easy Grader (avg. rating: 4.4)
Analysis Details
Fail
Suspicious Reviewers

One-Hit Wonders
7 of the 15 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.
Never-Verified Reviewers
4 of the 15 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, the discrepancy in ratings between the Never-Verified Reviewers and reviewers who have written at least one verified purchase review isn't significant enough to rule out the possibility of it being due to random chance.
Warn
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 4.5, while the average ease score for reviewers in this category is 3.9. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.5 Product's Average Ease Score
3.9 Category's Average Ease Score
Read more about our Reviewer Ease test.
Warn
Word Count Comparison

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- 93%
- 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 3 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 14 reviews (or 93%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
Warn
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:
2 reviews
(5.0/5)
(5.0/5)
2 reviews
(5.0/5)
(5.0/5)
2 reviews
(5.0/5)
(5.0/5)
Common Phrases in Titles:
2 reviews
(5.0/5)
(5.0/5)
3 of the 15 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.
Warn
Reviewer Participation

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- 100%
- 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 15 reviewers (or 100%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass
Rating Trend

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- 0%
- Created on high-volume days
We counted 15 reviews for this product over the span of 450 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 2 or fewer reviews on any given day. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass
Unverified Purchases

4 of the 15 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.
Pass
Overlapping Review History

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- 0%
- Substantial overlapping review history
0 of the 15 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.
Read more about our Overlapping Review History test.
Read more about our Overlapping Review History test.
Pass
Brand Repeats

Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
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.
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- 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

- 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.