Amazon.com > Beauty & Personal Care > Hair Care > Shampoo & Conditioner > Shampoo & Conditioner Sets
WOW Apple Cider Vinegar Shampoo & Hair Conditioner Set - (2 x 16.9 Fl Oz / 500mL) - Increase...
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Top products in Shampoo & Conditioner Sets with authentic reviews:
Warn Overall Grade
FAIL Rating Trend
FAIL Incentivized Reviews
FAIL Phrase Repetition
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Suspicious Reviewers
WARN Reviewer Participation
PASS Unverified Purchases
PASS Word Count Comparison
PASS Reviewer Ease
PASS Brand Repeats
Most Trusted Reviews
The first time I tried this my hair came out ... [Go to full review]
Jul 16, 2019
- Verified Purchaser
- Critical Reviewer (avg. rating: 4.0)
Least Trusted Reviews
I LOVE this shampoo and conditioner!! So I used to ... [Go to full review]
Aug 19, 2019
- Verified Purchaser
- Created on a high volume day
- Contains repetitive phrases (show)
- Overlapping Review History: reviewed 3 of 9 top products
- Overrepresented Participation (posted 17 reviews)
- Easy Grader (avg. rating: 5.0)
Fail Rating Trend
- Created over 30 days
We counted 6,842 reviews for this product over the span of 292 days, an average of 23.4 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 41 or fewer reviews on any given day.
However, we see the following 30 days exceeding this threshold:
Fail Incentivized Reviews
7 of the 6,842 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. Incentivized reviews have rated this product an average of 2.4 while reviews that were not incentivized rated this product an average of 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.
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.
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:
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Common Phrases in Titles:
653 of the 6,842 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.5 while reviews without substantial repetitive phrases rated this product an average of 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.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
509 of the 6,842 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.9 while the reviewers who have a more unique product review history rated this product an average of 4.0. 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.
Warn Deleted Reviews
We discovered a total of 51 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:
- We have no information on reviews that were never published in the first place.
4.7 average rating of deleted reviews
Show distribution of deleted reviews
Warn Suspicious Reviewers
757 of the 6,842 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.
Warn Reviewer Participation
- 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:
Pass Unverified Purchases
244 of the 6,842 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
- Have an overrepresented word count
Read more about our Word Count Comparison 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 4.2, while the average ease score for reviewers in this category is 4.3.
4.2 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
14 of the 6,842 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.