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Hyperbiotics PRO-15 Probiotics—60 Daily Time Release Pearls— Digestive Acidophilus...
More product info From Hyperbiotics Report Feedback


Rating:
7,802 Reviews
16% of potentially unnatural reviews removed (Why?)
Adjusted:
View/Edit Adjustment
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Report Card

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

Most Trusted Reviews

5/5
Got the job done without irritating my stomach. [Go to full review]
Mar 16, 2019      
100% TRUST
  • Verified Purchaser
  • Easy Grader (avg. rating: 4.4)


Least Trusted Reviews

I like the small tablet size. [Go to full review]
May 23, 2016      
0% TRUST
  • Unverified Purchaser
  • Created on a high volume day
  • Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
  • Critical Reviewer (avg. rating: 3.4)


Analysis Details

Fail Deleted Reviews

We discovered a total of 596 deleted reviews for this product, with an average rating of 4.7. 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 the Deleted Reviews test here.

4.7 average rating of deleted reviews

4.7


Show distribution of deleted reviews

Fail Rating Trend

  • 4%
  • Created over 23 days

We counted 7,802 reviews for this product over the span of 1,818 days, an average of 4.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 12 or fewer reviews on any given day.

However, we see the following 23 days exceeding this threshold:In total, we found that 337 reviews were created on just 23 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 4.2. 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


4.5
4.2


Read more about our Rating Trend test.

Fail Unverified Purchases

379 of the 7,802 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.4 while the verified purchasers 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 unverified purchasers

from verified purchases


4.4
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.

Fail Suspicious Reviewers

Take-Back Reviewers


4,847 of the 7,802 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.

from take-back reviewers

from reviewers without previously deleted reviews


4.3
4.2


Read more about our Suspicious Reviewers test.

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

1% also reviewed:
Fire by Amazon

Does not include products
from the same brand


683 of the 7,802 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.4 while the reviewers who have a more unique product review history 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 reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.4
4.2


Read more about our Overlapping Review History 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
  • 0%
  • Used substantial repetitive phrases
0 of the 7,802 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.
Read more about our Phrase Repetition test.

Pass Reviewer Participation

  • 24%
  • 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 1857 reviewers (or 24%) are within an overrepresented participation group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.2
4.3


Read more about our Reviewer Participation 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


646 of the 7,802 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


4.6
4.2


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.


14 of the 7,802 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


3.6
4.2


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.


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