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The Fourth Age: Smart Robots, Conscious Computers, and the Future of Humanity
More product info From Byron Reese

Amazon Reviews for  The Fourth Age: Smart Robots, Conscious Computers, and the Future of Humanity
Rating:
56 Ratings
56 Reviews
("Ratings" vs. "Reviews")
86% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card

Report Card

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

Most Trusted Reviews

He says that when someone at the top gets a ... [Go to full review]
Apr 28, 2018      
70% TRUST
  • Unverified Purchaser
  • Take-Back Reviewer (7 deleted Reviews; avg. rating: 3.0)
  • Critical Reviewer (avg. rating: 2.4)


Least Trusted Reviews

Byron Reese has done an incredible job of explaining AI ... [Go to full review]
Aug 28, 2018      
0% TRUST
  • Unverified Purchaser
  • Overrepresented word count (59 words)
  • Contains repetitive phrases (show)
  • Overrepresented Participation (posted 5 Reviews)
  • Easy Grader (avg. rating: 5.0)


Analysis Details

Fail 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 4.6, while the average ease score for reviewers in this category is 4.4. 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.

4.6 Product's Average Ease Score

4.4 Category's Average Ease Score


4.6
4.4


Read more about our Reviewer Ease test.


Fail Reviewer Participation

  • 91%
  • 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 51 reviewers (or 91%) are within an overrepresented participation group. These reviews have rated this product an average of 4.9, while all other reviews have rated this product an average of 3.6. 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.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.9
3.6


Read more about our Reviewer Participation test.

Warn Unverified Purchases

34 of the 56 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


4.8
4.9


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 Suspicious Reviewers

One-Hit Wonders


10 of the 56 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, the discrepancy in ratings between the One-Hit Wonders and reviewers who have posted more than one review isn't significant enough to rule out the possibility of it being due to random chance.

from one-hit wonders

from reviewers with more than one review


5.0
4.8


Never-Verified Reviewers


16 of the 56 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.

from never-verified reviewers

from reviewers with at least one verified purchase review


5.0
4.8


Take-Back Reviewers


4 of the 56 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.

from take-back reviewers

from reviewers without previously deleted reviews


5.0
4.8


Read more about our Suspicious Reviewers test.

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:
5 reviews
(5.0/5)
4 reviews
(4.8/5)
4 reviews
(5.0/5)
2 reviews
(5.0/5)
3 reviews
(5.0/5)
2 reviews
(5.0/5)
2 reviews
(5.0/5)
3 reviews
(5.0/5)
2 reviews
(5.0/5)
3 reviews
(5.0/5)
Show MoreShow Less
Common Phrases in Titles:
2 reviews
(5.0/5)
2 reviews
(4.5/5)
2 reviews
(5.0/5)


17 of the 56 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.9
4.8


Read more about our Phrase Repetition test.

Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 56 reviews for this product over the span of 197 days, an average of 0.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 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

  • 25%
  • 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 14 reviews (or 25%) are within an overrepresented word count group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviews with an overrepresented word count

from reviews with a properly represented word count


5.0
4.8


Read more about our Word Count Comparison test.

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

9% also reviewed:
Incendies by Lubna Azabal

7% also reviewed:
Blitz [Blu-ray] by Jason Statham

7% also reviewed:
Reloaded by Not Specified

Does not include products
from the same brand


1 of the 56 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.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


5.0
4.8


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.

  • 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.