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Quantum Leap - The Complete Second Season
More product info From Quantum

Review Hijacking Alert!
1 review is coming from a seemingly different product variation:

Another Mother September 30 1981 (Example Review )



Learn more about Review Hijacking.

Rating:
306 Reviews
62% of potentially unnatural reviews removed (Why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card
Report Info:
Last Updated: Jul 1, 2017
Refresh Report
Note: While Amazon.com claims 306 reviews, we counted 213 available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Top products in TV with authentic reviews:


Shaun the Sheep Season 3



Adjusted
Rating:
1,246 Reviews

Foyle's War Season 5



Adjusted
Rating:
234 Reviews

Report Card

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

Most Trusted Reviews

I first caught this show in reruns the summer between ... [Go to full review]
Jul 10, 2016      
75% TRUST
  • Verified Purchaser
  • Contains repetitive phrases (show)
  • Overrepresented Participation (posted 2 reviews)
  • Critical Reviewer (avg. rating: 4.0)


Least Trusted Reviews

I have only watched two episodes so far here on ... [Go to full review]
Jul 12, 2013      
45% TRUST
  • Unverified Purchaser
  • Overrepresented word count (138 words)
  • Contains repetitive phrases (show)
  • Overrepresented Participation (posted 24 reviews)
  • Easy Grader (avg. rating: 4.5)


Analysis Details

Fail Rating Trend

  • 9%
  • Created over 5 days

We counted 213 reviews for this product over the span of 4,673 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.

However, we see the following 5 days exceeding this threshold:In total, we found that 19 reviews were created on just 5 days. The reviews on these high volume days have rated this product an average of 2.5 while reviews from other days have rated this product an average of 4.2. 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 created on high volume days

from reviews created on normal volume days


2.5
4.2


Read more about our Rating Trend test.

Fail Suspicious Reviewers

One-Hit Wonders


22 of the 213 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


3.4
4.1


Never-Verified Reviewers


40 of the 213 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.4 while the reviewers who have written at least one verified purchase review rated this product an average of 4.2. 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 never-verified reviewers

from reviewers with at least one verified purchase review


3.4
4.2


Take-Back Reviewers


18 of the 213 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, it does not appear to have a significant impact on the overall rating.

from take-back reviewers

from reviewers without previously deleted reviews


3.7
4.0


Read more about our Suspicious Reviewers test.

Warn Unverified Purchases

122 of the 213 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


3.8
4.2


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 Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.

Common Phrases in Titles:
4 reviews


48 of the 213 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


3.7
4.1


Read more about our Phrase Repetition test.

Warn Reviewer Participation

  • 75%
  • 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 160 reviewers (or 75%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


3.9
4.3


Read more about our Reviewer Participation test.

Pass Word Count Comparison

  • 16%
  • 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 35 reviews (or 16%) 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


3.5
4.1


Read more about our Word Count Comparison test.

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

4% also reviewed:
... by J.K. Rowling

3% also reviewed:
Jaws 2 by SCHEIDER/GARY/HAMILTON

Does not include products
from the same brand


27 of the 213 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


4.2
4.0


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

4.1 Product's Average Ease Score

4.4 Category's Average Ease Score


4.1
4.4


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


7 of the 213 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


3.9
4.0


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, or 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 the Deleted Reviews test here.


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