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Amazon.com > Beauty & Personal Care > Personal Care > Deodorants & Antiperspirants > Antiperspirants
Certain Dri Antiperspirant Solid for Excessive Perspiration-1.7 Ounce, 2 Pack
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From Certain Dri
This report was last updated 6/28/2021.
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: While Amazon.com claims 200 Ratings, we counted 260 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Pass Overall Grade
FAIL Unverified Purchases
FAIL Suspicious Reviewers
FAIL Word Count Comparison
FAIL Overlapping Review History
WARN Deleted Reviews
PASS Rating Trend
PASS Phrase Repetition
PASS Reviewer Participation
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
Didn't really do the job. The roll on works better, ... [Go to full review]
Sep 21, 2017
100%
TRUST
TRUST
- Verified Purchaser
- Contains repetitive phrases (show)
- Easy Grader (avg. rating: 4.7)
Least Trusted Reviews
this has been the best item i have ever purchased ... [Go to full review]
Aug 11, 2017
0%
TRUST
TRUST
- Unverified Purchaser
- Overlapping Review History: reviewed 1 of 9 top products
- Easy Grader (avg. rating: 5.0)
Analysis Details
Fail Unverified Purchases
18 of the 260 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 3.1 while the verified purchasers have rated this product an average of 3.8. 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.
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
One-Hit Wonders
6 of the 260 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 2.3 while the reviewers who have posted more than one review have rated this product an average of 3.8. 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.
Take-Back Reviewers
141 of the 260 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.
Fail Word Count Comparison
-
- 39%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 2 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 101 reviews (or 39%) are within an overrepresented word count group. These reviews have rated this product an average of 4.1, while all other reviews have rated this product an average of 3.5. 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:
2% also reviewed:
Certain Dri Antiperspirant Solid for Excessive... by DSE
2% also reviewed:
Sweatblock Clinical Strength Antiperspirant Wipes... by SweatBlock
2% also reviewed:
Georgia-Pacific Spectrum Standard 92 Multipurpose... by Georgia-Pacific
2% also reviewed:
MJ Metals Jewelry 8mm White Tungsten Carbide... by MJ Metals Jewelry
2% also reviewed:
Fitbit Blaze Special Edition, Gun Metal, Large... by Fitbit
1% also reviewed:
Amazon Basics 11.6-Inch Laptop Sleeve, Protective... by Amazon Basics
1% also reviewed:
Soundbot SB510 HD Bluetooth Shower Speaker, Water... by Soundbot
Does not include products
from the same brand
from the same brand
31 of the 260 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 3.7. 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.
Warn Deleted Reviews
We discovered a total of 9 deleted Reviews for this product, with an average rating of 3.9. 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:
- 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.
Pass Rating Trend
-
- 0%
- Created on high-volume days
We counted 260 reviews for this product over the span of 2,544 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.
Read more about our Rating Trend 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:
Show MoreShow Less
8 reviews
(4.6/5)
(4.6/5)
2 reviews
(5.0/5)
(5.0/5)
4 reviews
(2.8/5)
(2.8/5)
2 reviews
(3.5/5)
(3.5/5)
3 reviews
(3.7/5)
(3.7/5)
10 of the 260 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.
Pass Reviewer Participation
-
- 0%
- From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation test.
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 4.1, while the average ease score for reviewers in this category is 4.2.
4.1 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
33 of the 260 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.
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.
-
- 0%
- Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive 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.