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UV LED Nail Lamp, Terresa 72W Nail Dryer Starter Kit for Gel Nail Polish, UV Light for Nails Curing...
More product info From Terresa

Amazon Reviews for  UV LED Nail Lamp, Terresa 72W Nail Dryer Starter Kit for Gel Nail Polish, UV Light for Nails Curing with DIY Gel Manicure Nail Tools, 3 Timer Setting Gel Lamp for Home and Salon Use
Rating:
1,430 Ratings
423 Reviews
("Ratings" vs. "Reviews")
3% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Apr 3, 2021
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Show Report History
Note: While Amazon.com claims 1,430 Ratings, we counted 423 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

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

Most Trusted Reviews

Using Opi Gel Base Coat, two coats of Opi ‘Don’t ... [Go to full review]
Jul 7, 2020      
100% TRUST
  • Verified Purchaser
  • Easy Grader (avg. rating: 5.0)


Least Trusted Reviews

Love all the extras! [Go to full review]
Apr 27, 2020      
19% TRUST
  • Verified Purchaser
  • Overlapping Review History: reviewed 1 of 9 top products
  • Overrepresented Participation (posted 10 Reviews)
  • Easy Grader (avg. rating: 4.8)


Analysis Details

Fail Deleted Reviews

We discovered a total of 66 deleted Reviews for this product, with an average rating of 4.9. 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.

4.9 average rating of deleted reviews

4.9


Show distribution of deleted reviews

Fail 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:
6 reviews
(5.0/5)
4 reviews
(5.0/5)
8 reviews
(4.9/5)
8 reviews
(5.0/5)
3 reviews
(5.0/5)
4 reviews
(5.0/5)
4 reviews
(4.8/5)
5 reviews
(5.0/5)
4 reviews
(4.3/5)
Show MoreShow Less


23 of the 423 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 5.0 while reviews without substantial repetitive phrases rated this product an average of 4.5. 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 substantial repetitive phrases

from reviews without substantial repetitive phrases


5.0
4.5


Read more about our Phrase Repetition test.

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



31 of the 423 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.9 while the reviewers who have a more unique product review history rated this product an average of 4.5. 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 substantial overlapping history

from reviewers without a substantial overlapping history


4.9
4.5


Read more about our Overlapping Review History test.

Warn Reviewer Participation

  • 77%
  • 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 324 reviewers (or 77%) 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


4.5
4.7


Read more about our Reviewer Participation test.

Pass Rating Trend

  • 3%
  • Created over 2 days

We counted 423 reviews for this product over the span of 520 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 2 days exceeding this threshold:In total, we found that 12 reviews were created on just 2 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


4.9
4.5


Read more about our Rating Trend test.

Pass Unverified Purchases

34 of the 423 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
4.6


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

  • 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 Suspicious Reviewers

One-Hit Wonders


38 of the 423 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.

from one-hit wonders

from reviewers with more than one review


4.1
4.6


Never-Verified Reviewers


8 of the 423 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.

from never-verified reviewers

from reviewers with at least one verified purchase review


4.5
4.5


Take-Back Reviewers


67 of the 423 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.

from take-back reviewers

from reviewers without previously deleted reviews


4.5
4.5


Single-Day Reviewers


10 of the 423 reviewers have written multiple reviews but posted all of them on a single day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from single-day reviewers

from non-single-day reviewers


4.7
4.5


Read more about our Suspicious Reviewers 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 4.4, while the average ease score for reviewers in this category is 4.4.

4.4 Product's Average Ease Score

4.4 Category's Average Ease Score


4.4
4.4


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


14 of the 423 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


5.0
4.5


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.