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Pro Gainer From Optimum Nutrition Report Feedback

Fail Unnatural reviews detected

Original:

728 Reviews

Adjusted:

171 Reviews

92%
99%

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


Original:

1 Review


Adjusted:

1 Review


Original:

7 Reviews


Adjusted:

6 Reviews

Pro Complex Gainer From Optimum

8.3
(Out of 10, after 24 reviews)

Most Trusted Reviews

10/10
Hands-down one of the best, if not the best, lean-gainers ... [Go to full review]
Jan 6, 2012      
100% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (2 deleted reviews; avg. rating: 9.5)
  • Easy Grader (avg. rating: 8.7)


Least Trusted Reviews

10/10
lean gainer.. 650 cal. 80 something grams of carbs, and ... [Go to full review]
Oct 6, 2008      
0% TRUST
  • Unverified Purchaser
  • Never-Verified Reviewer
  • Single-Day Reviewer (posted all reviews on Oct 6, 2008)
  • Take-Back Reviewer (1 deleted review; avg. rating: 10.0)
  • Brand Loyalist (2 of 3 reviews for this brand; avg rating: 10.0)
  • Overrepresented Participation (posted 3 reviews)
  • Easy Grader (avg. rating: 10.0)


Analysis Details

Note: While Bodybuilding.com claims 728 reviews, we counted 692 available on their site.

Fail Brand Repeats

Brand Repeaters


223 of the 692 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from Brand Repeaters

from Non-Repeaters


9.1
9.4


Brand Loyalists


154 of the 692 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


9.0
9.4


Brand Monogamists


67 of the 692 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


9.2
9.3


Read more about our Brand Repeats test.

Fail Suspicious Reviewers

One-Hit Wonders


283 of the 692 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 9.4 while the reviewers who have posted more than one review have rated this product an average of 9.2. 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 one-hit wonders

from reviewers with more than one review


9.4
9.2


Never-Verified Reviewers


254 of the 692 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


9.3
9.3


Take-Back Reviewers


108 of the 692 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


9.2
9.3


Single-Day Reviewers


117 of the 692 reviewers have written multiple reviews but posted all of them on a single day. While this is more Single-Day Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from single-day reviewers

from non-single-day reviewers


9.1
9.3


Read more about our Suspicious Reviewers 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 9.1, while the average ease score for reviewers in this category is 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.

9.1 Product's Average Ease Score

8.7 Category's Average Ease Score


9.1
8.7


Read more about our Reviewer Ease test.


Fail Skewed Helpfulness
We examined the average net helpfulness score of negative reviews against the average net helpfulness score of positive reviews. The net helpfulness score is the number of times a review has been marked as helpful minus the number of times a review has been marked as unhelpful. We found that the negative reviews had an average net helpfulness score of -0.7 while the positive reviews had an average net helpfulness score of 0.1. Based on our statistical modeling, this discrepancy is significant enough to believe that the difference is not due to random chance, but possibly due to influence of unnatural voting patterns.

Example critical reviews

0.1 average net helpfulness for positive reviews

-0.7 average net helpfulness for negative reviews


Read more about our Skewed Helpfulness test.


Warn Deleted Reviews

We discovered a total of 13 deleted reviews for this product, with an average rating of 8.9. 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.

8.9 average rating of deleted reviews

8.9



Read more about our Deleted Reviews test.

Warn Reviewer Participation

  • 85%
  • 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 585 reviewers (or 85%) 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


9.3
9.3


Read more about our Reviewer Participation test.

Pass Rating Trend

  • 0%
  • Created over 1 day
We counted 692 reviews for this product over the span of 3,507 days, an average of 0.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.

However, we see the following 1 day exceeding this threshold:In total, we found that 0 reviews were created on just 1 day. 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 Rating Trend test.

Pass Unverified Purchases

311 of the 692 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


9.2
9.4


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:
27 reviews
(3.9%)
17 reviews
(2.5%)
20 reviews
(2.9%)
8 reviews
(1.2%)
7 reviews
(1.0%)
10 reviews
(1.4%)
Show MoreShow Less


16 of the 692 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


9.6
9.3


Read more about our Phrase Repetition test.

Pass Overlapping Review History

6% also reviewed:
C4 Original by Cellucor

4% also reviewed:
N.O.-Xplode by BSN

4% also reviewed:
Pre JYM by JYM

4% also reviewed:
Syntha-6 by BSN

4% also reviewed:
Xtend by SciVation

4% also reviewed:
Combat Powder by MusclePharm

3% also reviewed:
Phase8 by MuscleTech

2% also reviewed:
ISO100 by Dymatize

2% also reviewed:
CON-CRET by ProMera Sports

Does not include products
from the same brand


149 of the 692 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


9.1
9.4


Read more about our Overlapping Review History test.

Pass Sample Reviews

3 of the 692 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"


8.7
9.3


Read more about our Sample Reviews test.