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NURSAL Shiatsu Neck and Shoulder Massager - Back Massager with Heat, Deep Kneading Electric Massage...
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From NURSAL
This report was last updated 11/20/2019.
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Fail Overall Grade
FAIL Rating Trend
FAIL Reviewer Ease
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Reviewer Participation
PASS Unverified Purchases
PASS Word Count Comparison
PASS Phrase Repetition
PASS Suspicious Reviewers
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
Got this as a gift for my mother. She loves ... [Go to full review]
Oct 23, 2019
100%
TRUST
TRUST
- Verified Purchaser
- Brand Repeater (2 of 28 reviews for this brand; avg rating: 5.0)
- Critical Reviewer (avg. rating: 4.2)
Least Trusted Reviews
This is a good quality portable massager that can be ... [Go to full review]
Oct 16, 2019
0%
TRUST
TRUST
- Verified Purchaser
- Created on a high volume day
- Take-Back Reviewer (4 deleted Reviews; avg. rating: 5.0)
- Brand Repeater (2 of 8 reviews for this brand; avg rating: 5.0)
- Overlapping Review History: reviewed 1 of 9 top products
- Overrepresented Participation (posted 8 Reviews)
- Easy Grader (avg. rating: 5.0)
Analysis Details
Fail Rating Trend
-
- 39%
- Created over 19 days
We counted 361 reviews for this product over the span of 461 days, an average of 0.8 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 5 or fewer reviews on any given day.
However, we see the following 19 days exceeding this threshold:In total, we found that 141 reviews were created on just 19 days. The reviews on these high volume days have rated this product an average of 4.9 while reviews from other days have rated this product an average of 4.8. 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.
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 4.3. 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.
4.6 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
4% also reviewed:
Cordless Vacuum, ONSON Stick Vacuum Cleaner,... by ONSON
4% also reviewed:
Milemont Shredded Memory Foam Adjustable Pillow,... by Milemont
3% also reviewed:
Car Vacuum High Power, HOTOR Portable Car Vacuum... by HOTOR
76 of the 361 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 5.0 while the reviewers who have a more unique product review history rated this product an average of 4.8. 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.
Warn Deleted Reviews
We discovered a total of 4 deleted Reviews for this product, with an average rating of 4.5. 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:
- 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.
Warn Reviewer Participation
-
- 58%
- 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 210 reviewers (or 58%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
22 of the 361 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 Word Count Comparison
-
- 18%
- 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 65 reviews (or 18%) 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.
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:
Show MoreShow Less
10 reviews
(4.9/5)
(4.9/5)
7 reviews
(4.7/5)
(4.7/5)
25 reviews
(5.0/5)
(5.0/5)
12 reviews
(5.0/5)
(5.0/5)
5 reviews
(5.0/5)
(5.0/5)
5 reviews
(5.0/5)
(5.0/5)
5 reviews
(4.8/5)
(4.8/5)
5 reviews
(4.8/5)
(4.8/5)
3 reviews
(5.0/5)
(5.0/5)
6 reviews
(5.0/5)
(5.0/5)
Common Phrases in Titles:
8 reviews
(5.0/5)
(5.0/5)
20 of the 361 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.
Pass Suspicious Reviewers
One-Hit Wonders
18 of the 361 reviewers have only reviewed this product. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Never-Verified Reviewers
8 of the 361 reviewers have never written a verified purchase review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Take-Back Reviewers
71 of the 361 reviewers have had at least one of their past reviews for another product deleted. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Single-Day Reviewers
We didn't detect a substantial amount of Single-Day Reviewers.
Pass Brand Repeats
Brand Repeaters
11 of the 361 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.
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.
2 of the 361 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. 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 Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.