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eufy BoostIQ RoboVac 11S (Slim), Super-Thin, 1300Pa Strong Suction, Quiet, Self-Charging Robotic... From eufy Report Feedback

Fail Unnatural reviews detected

Original:

2,994 Reviews

Adjusted:

1,614 Reviews

Rank in: Robotic Vacuums
77%
68%

View/Edit Adjustment
How is this calculated
Report Last Updated: Jun 15, 2018
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Report Card

Click a test to jump to details

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

this is our first robo vacuum and I've seen others ... [Go to full review]
Jun 4, 2018      
100% TRUST
  • Verified Purchaser
  • Overlapping Review History: reviewed 1 of 9 top products
  • Critical Reviewer (avg. rating: 3.1)


Least Trusted Reviews

Wow!! So impressed! This was Deal of the Day for ... [Go to full review]
May 27, 2017      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
  • Overrepresented Participation (posted 13 reviews)
  • Easy Grader (avg. rating: 4.2)


Analysis Details


Fail Rating Trend

  • 10%
  • Created over 16 days

We counted 2,994 reviews for this product over the span of 570 days, an average of 5.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 14 or fewer reviews on any given day.

However, we see the following 16 days exceeding this threshold:In total, we found that 287 reviews were created on just 16 days. The reviews on these high volume days have rated this product an average of 4.5 while reviews from other days 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 created on high volume days

from reviews created on normal volume days


4.5
4.3


Read more about our Rating Trend test.

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

4.2 Product's Average Ease Score

4.1 Category's Average Ease Score


4.2
4.1


Read more about our Reviewer Ease test.


Warn Deleted Reviews

We discovered a total of 53 deleted reviews for this product, with an average rating of 4.4. 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.

4.4 average rating of deleted reviews

4.4



Read more about our Deleted Reviews test.

Warn Suspicious Reviewers

Take-Back Reviewers


162 of the 2,994 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


4.3
4.3


Read more about our Suspicious Reviewers test.

Warn Reviewer Participation

  • 74%
  • 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 2217 reviewers (or 74%) 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


4.3
4.4


Read more about our Reviewer Participation test.

Pass Unverified Purchases

129 of the 2,994 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
4.3


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 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:
148 reviews
(4.8/5)
67 reviews
(4.3/5)
38 reviews
(3.8/5)
30 reviews
(4.2/5)
37 reviews
(4.4/5)
55 reviews
(4.8/5)
Show MoreShow Less
Common Phrases in Titles:
117 reviews
(4.5/5)
33 reviews
(4.5/5)


59 of the 2,994 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


4.5
4.3


Read more about our Phrase Repetition test.

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

1% also reviewed:
Amazon Echo by Amazon



92 of the 2,994 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


4.3
4.3


Read more about our Overlapping Review History test.

Pass Brand Repeats

Brand Repeaters


38 of the 2,994 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
4.3


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.


3 of the 2,994 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.

from incentivized reviews

from non-incentivized reviews


5.0
4.3


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.