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Zhou Neuro Peak Brain Support Supplement | Memory, Focus & Clarity Formula | DMAE, Rhodiola...
More product info
From ZHOU
This report was last updated 5/6/2024.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
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Report Card
Pass Overall Grade
FAIL 
Deleted Reviews
Deleted ReviewsWARN Incentivized Reviews
Incentivized ReviewsWARN Suspicious Reviewers
Suspicious ReviewersWARN Phrase Repetition
Phrase RepetitionPASS Rating Trend
Rating TrendPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Overlapping Review History
Overlapping Review HistoryPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsN/A Reviewer Participation
Reviewer Participation
Most Trusted Reviews
I do believe it works well. Gave me energy and ... [Go to full review]
Feb 10, 2024
100%
TRUST
TRUST
-
Verified Purchaser
-
Critical Reviewer (avg. rating: 4.0)
Overlapping Review History: reviewed 1 of 9 top products
Brand Repeater (2 of 96 reviews for this brand; avg rating: 4.0)
Least Trusted Reviews
My son is taking these pills about one month, and ... [Go to full review]
Jan 30, 2017
0%
TRUST
TRUST
-
Unverified Purchaser -
Created on a high volume day
-
One-Hit Wonder -
Never-Verified Reviewer -
Take-Back Reviewer (1 deleted Review; avg. rating: 5.0) -
Overrepresented Participation (posted 1 Review) -
Easy Grader (avg. rating: 5.0)
Analysis Details
Fail Deleted Reviews
Deleted Reviews
We discovered a total of 1,452 deleted Reviews for this product, with an average rating of 4.6. 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:
- 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.
- We have no information on reviews that were never published in the first place.
- 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.
4.6 average rating of deleted reviews
Warn Incentivized Reviews
Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
Less than approximately 10% of reviews admitted to receiving a free or discounted product in exchange for a review. While we could not find a statistically significant difference between the average rating of incentivized reviews and non-incentivized reviews, the presences of at least one incentivized review indicates that there may be more, since not all reviewers will disclose that they had received an incentive to post a review.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Warn Suspicious Reviewers
Suspicious Reviewers
One-Hit Wonders
Approximately 30% of 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.
Take-Back Reviewers
Approximately 40% of 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, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.
Warn Phrase Repetition
Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Titles:
~56% of reviews
(5.0/5)
(5.0/5)
~28% of reviews
(1.0/5)
(1.0/5)
~100% of reviews
(3.6/5)
(3.6/5)
Approximately 35% of reviews use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.
Pass Rating Trend
Rating Trend
-
- <10%
- Created on high-volume days
We didn't notice any signals that would indicate reviews were created unevenly over time.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Unverified Purchases
Unverified Purchases
461 of the 14,441 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.
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
Word Count Comparison
-
- <10%
- 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.
Read more about our Word Count Comparison test.
Pass Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
<10% also reviewed:
HEMPZ Body Lotion Original - Floral &... by Hempz
<10% also reviewed:
Maybelline New York Eye Studio Color Tattoo Metal... by Maybelline New York
<10% also reviewed:
Peptide Collagen Serum for Face - Anti-Aging... by Foxbrim Naturals
<10% also reviewed:
L.A. Girl Pro Conceal 969 Porcelain by L.A. Girl
<10% also reviewed:
Thermal Grizzly Kryonaut, High Performance... by Thermal Grizzly
<10% also reviewed:
Joico Ironclad Thermal Protectant Spray | Protect... by Joico
<10% also reviewed:
Progenix Vitamin C Dark Spot Face Cream One Color... by Progenix
<10% also reviewed:
Unicra Wedding Hair Pins for Women Decorative... by Unicra
<10% also reviewed:
Milani Baked Highlighter (Dolce Perla) -... by Milani
Approximately 15% of 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.
Pass Reviewer Ease
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 3.8, while the average ease score for reviewers in this category is 4.3.
3.8 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
Less than approximately 10% of 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.
