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A Short Biography of the Scientist Sir Isaac Newton (30 Minute Book Series 1)
More product info From Doug West

Amazon Reviews for  A Short Biography of the Scientist Sir Isaac Newton (30 Minute Book Series 1)
Rating:
2 Ratings
2 Reviews
("Ratings" vs. "Reviews")
0% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Jul 24, 2017
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Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

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

Most Trusted Reviews

Excellent excellent book. Not once does it mention an Apple ... [Go to full review]
May 8, 2016      
100% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (3 deleted Reviews; avg. rating: 5.0)
  • Brand Repeater (2 of 99 reviews for this brand; avg rating: 5.0)
  • Easy Grader (avg. rating: 4.8)


Least Trusted Reviews

We couldn't find any low-quality reviews

Analysis Details

Fail Suspicious Reviewers

Take-Back Reviewers


1 of the 2 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.

from take-back reviewers

from reviewers without previously deleted reviews


5.0
5.0


Read more about our Suspicious Reviewers test.

Warn Unverified Purchases

1 of the 2 total reviews for this product are unverified purchases. While this is a higher percentage of unverified purchases than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from unverified purchasers

from verified purchases


5.0
5.0


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.

Warn Brand Repeats

Brand Repeaters


1 of the 2 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from Brand Repeaters

from Non-Repeaters


5.0
5.0


Read more about our Brand Repeats test.

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 4.9, while the average ease score for reviewers in this category is 4.3. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

4.9 Product's Average Ease Score

4.3 Category's Average Ease Score


4.9
4.3


Read more about our Reviewer Ease test.


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

100% also reviewed:
SHARRK GoPro Accessories 2 by SHARKK

Does not include products
from the same brand


1 of the 2 reviewers have substantial overlapping product review history. While this is more than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


5.0
5.0


Read more about our Overlapping Review History test.

Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 2 reviews for this product over the span of 256 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. We didn't find any days exceeding this threshold.
Read more about our Rating Trend 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
  • 0%
  • Used substantial repetitive phrases
0 of the 2 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.
Read more about our Phrase Repetition test.

Pass Reviewer Participation

  • 0%
  • From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation 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.

  • 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.

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:
  1. 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.
  2. We have no information on reviews that were never published in the first place.
  3. 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.
Read more about our Deleted Reviews test.