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Fahrenheit 451
More product info From Ray Bradbury

Amazon Reviews for  Fahrenheit 451
Rating:
3,639 Ratings
3,930 Reviews
("Ratings" vs. "Reviews")
3% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Jul 6, 2020
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Note: While Amazon.com claims 3,639 Ratings, we counted 3,930 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Top products in Fantasy with authentic reviews:


Report Card

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

Most Trusted Reviews

Great book, it really is, just one problem, passive writting ... [Go to full review]
May 1, 2004      
100% TRUST
  • Unverified Purchaser
  • Take-Back Reviewer (90 deleted Reviews; avg. rating: 4.2)
  • Easy Grader (avg. rating: 4.3)


Least Trusted Reviews

3/5
Sep 22, 2019      
0% TRUST
  • Verified Purchaser
  • Overrepresented word count (1 word)
  • Single-Day Reviewer (posted all reviews on Sep 22, 2019)
  • Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
  • Overrepresented Participation (posted 2 Reviews)
  • Critical Reviewer (avg. rating: 2.5)


Analysis Details

Fail Deleted Reviews

We discovered a total of 353 deleted Reviews for this product, with an average rating of 4.1. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.

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.

4.1 average rating of deleted reviews

4.1


Show distribution of deleted reviews

Fail Suspicious Reviewers

One-Hit Wonders


413 of the 3,930 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from one-hit wonders

from reviewers with more than one review


4.0
4.4


Take-Back Reviewers


1,225 of the 3,930 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 4.4 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 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.

from take-back reviewers

from reviewers without previously deleted reviews


4.4
4.3


Single-Day Reviewers


93 of the 3,930 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 4.6 while all other reviewers rated this product an average of 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.

from single-day reviewers

from non-single-day reviewers


4.6
4.4


Read more about our Suspicious Reviewers test.

Fail Word Count Comparison

  • 17%
  • 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 655 reviews (or 17%) are within an overrepresented word count group. These reviews have rated this product an average of 4.6, while all other reviews have rated this product an average of 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.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.6
4.3


Read more about our Word Count Comparison test.

Warn Reviewer Participation

  • 29%
  • 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 1131 reviewers (or 31%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.2
4.4


Read more about our Reviewer Participation test.

Pass Rating Trend

  • 4%
  • Created over 25 days

We counted 3,930 reviews for this product over the span of 8,694 days, an average of 0.5 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 4 or fewer reviews on any given day.

However, we see the following 25 days exceeding this threshold:In total, we found that 147 reviews were created on just 25 days. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviews created on high volume days

from reviews created on normal volume days


4.1
4.4


Read more about our Rating Trend test.

Pass Unverified Purchases

1,661 of the 3,930 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.

from unverified purchasers

from verified purchases


4.2
4.5


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 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:
43 reviews
(4.0/5)
103 reviews
(4.3/5)
166 reviews
(4.1/5)
60 reviews
(4.4/5)
51 reviews
(4.2/5)
31 reviews
(4.5/5)
45 reviews
(4.2/5)
83 reviews
(4.2/5)
123 reviews
(4.1/5)
44 reviews
(4.1/5)
Show MoreShow Less


153 of the 3,930 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.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.1
4.4


Read more about our Phrase Repetition test.

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

5% also reviewed:
Brave New World by Aldous Huxley

Does not include products
from the same brand


682 of the 3,930 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


4.4
4.3


Read more about our Overlapping Review History test.

Pass 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 4.3, while the average ease score for reviewers in this category is 4.3.

4.3 Product's Average Ease Score

4.3 Category's Average Ease Score


4.3
4.3


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


119 of the 3,930 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.

from Brand Repeaters

from Non-Repeaters


4.5
4.4


Read more about our Brand Repeats 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.