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Gold Standard 100% Casein From Optimum Nutrition Report Feedback

Fail Unnatural reviews detected

Original:

2,729 Reviews

Adjusted:

436 Reviews

56%
71%

View/Edit Adjustment
How is this calculated
Report Last Updated: Jul 19, 2017
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Report Card

Click a test to jump to details

FAIL Brand Repeats
FAIL Suspicious Reviewers
FAIL Phrase Repetition
WARN Deleted Reviews
WARN Unverified Purchases
WARN Reviewer Ease
WARN Reviewer Participation
PASS Rating Trend
PASS Word Count Comparison
PASS Overlapping Review History
PASS Sample Reviews
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Other analysis for this product:


Original:

3 Reviews


Adjusted:

3 Reviews

Optimum Nutrition 100% Casein Protein From Optimum Nutrition

Pass Reviews appear natural


Original:

59 Reviews


Adjusted:

50 Reviews


Original:

1 Review


Adjusted:

Insufficient reviews


Original:

329 Reviews


Adjusted:

234 Reviews


Original:

1 Review


Adjusted:

Insufficient reviews

Most Trusted Reviews

8/10
I've tried six flavors of this casein. Chocolate supreme is ... [Go to full review]
Sep 17, 2016      
100% TRUST
  • Verified Purchaser
  • Overlapping Review History: reviewed 2 of 9 top products
  • Critical Reviewer (avg. rating: 8.0)


Least Trusted Reviews

9/10
Chocolate was great! I am normally a cookies and cream ... [Go to full review]
Aug 3, 2012      
0% TRUST
  • Unverified Purchaser
  • Contains repetitive phrases (show)
  • Never-Verified Reviewer
  • Single-Day Reviewer (posted all reviews on Aug 3, 2012)
  • Take-Back Reviewer (1 deleted review; avg. rating: 10.0)
  • Brand Loyalist (2 of 3 reviews for this brand; avg rating: 9.5)
  • Overlapping Review History: reviewed 1 of 9 top products
  • Overrepresented Participation (posted 3 reviews)
  • Easy Grader (avg. rating: 9.7)


Analysis Details

Note: While Bodybuilding.com claims 2,729 reviews, we counted 2,563 available on their site.

Fail Brand Repeats

Brand Repeaters


1,406 of the 2,563 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, the discrepancy in ratings between the Brand Repeaters and non-repeaters isn't significant enough to rule out the possibility of it being due to random chance.

from Brand Repeaters

from Non-Repeaters


8.9
8.5


Brand Loyalists


1,020 of the 2,563 reviewers have reviewed multiple products but half or more of their reviews are for this brand. This is an excessively large percentage of Brand Loyalists which may indicate unnatural reviews.

from Brand Loyalists

from Non-Loyalists


8.9
8.6


Brand Monogamists


491 of the 2,563 reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.

from Brand Monogamists

from Non-Monogamists


9.0
8.7


Read more about our Brand Repeats test.

Fail Suspicious Reviewers

One-Hit Wonders


605 of the 2,563 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


8.5
8.8


Never-Verified Reviewers


1,250 of the 2,563 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from never-verified reviewers

from reviewers with at least one verified purchase review


8.7
8.7


Take-Back Reviewers


549 of the 2,563 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 8.9 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 8.7. 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 take-back reviewers

from reviewers without previously deleted reviews


8.9
8.7


Single-Day Reviewers


782 of the 2,563 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 8.9 while all other reviewers rated this product an average of 8.6. 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 single-day reviewers

from non-single-day reviewers


8.9
8.6


Read more about our Suspicious Reviewers test.

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:
72 reviews
94 reviews
41 reviews
Show MoreShow Less


96 of the 2,563 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 9.1 while reviews without substantial repetitive phrases rated this product an average of 8.7. 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


9.1
8.7


Read more about our Phrase Repetition test.

Warn Deleted Reviews

We discovered a total of 27 deleted reviews for this product, with an average rating of 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 the Deleted Reviews test here.

9.0 average rating of deleted reviews

9.0


Show distribution of deleted reviews

Warn Unverified Purchases

1,663 of the 2,563 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


8.7
8.8


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 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 8.8, while the average ease score for reviewers in this category is 8.8. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

8.8 Product's Average Ease Score

8.8 Category's Average Ease Score


8.8
8.8


Read more about our Reviewer Ease test.


Warn Reviewer Participation

  • 78%
  • 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 1994 reviewers (or 78%) 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


8.7
8.8


Read more about our Reviewer Participation test.

Pass Rating Trend

  • 2%
  • Created over 6 days

We counted 2,563 reviews for this product over the span of 3,555 days, an average of 0.7 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 6 days exceeding this threshold:In total, we found that 45 reviews were created on just 6 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


9.0
8.7


Read more about our Rating Trend 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 Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

9% also reviewed:
Xtend by SciVation

7% also reviewed:
Syntha-6 by BSN

7% also reviewed:
C4 Original by Cellucor

5% also reviewed:
N.O.-Xplode by BSN

4% also reviewed:
Combat Powder by MusclePharm

3% also reviewed:
ISO100 by Dymatize

3% also reviewed:
CON-CRET by ProMera Sports

3% also reviewed:
Quest Bars by Quest Nutrition

Does not include products
from the same brand


738 of the 2,563 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


8.7
8.7


Read more about our Overlapping Review History test.

Pass Sample Reviews

8 of the 2,563 total reviews for this product mentioned the word "sample" within their review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviews that use the word "sample"

from reviews that don't use the word "sample"


8.3
8.7


Read more about our Sample Reviews test.


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