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Fels Naptha Laundry Bar and Stain Remover, 5.0 Oz
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From Fels Naptha
This report was last updated 8/28/2022.
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Note: We only analyze "reviews" and ignore one-tap "ratings".
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Report Card
Pass Overall Grade
FAIL Deleted Reviews
FAIL Unverified Purchases
FAIL Brand Repeats
FAIL Suspicious Reviewers
FAIL Phrase Repetition
WARN Rating Trend
WARN Word Count Comparison
PASS Overlapping Review History
PASS Reviewer Ease
PASS Incentivized Reviews
N/A Reviewer Participation
Most Trusted Reviews
The review is more for the availability of the product ... [Go to full review]
Jul 14, 2022
100%
TRUST
TRUST
- Verified Purchaser
- Take-Back Reviewer (3 deleted Reviews; avg. rating: 4.7)
- Overlapping Review History: reviewed 1 of 9 top products
- Critical Reviewer (avg. rating: 3.4)
Least Trusted Reviews
Fels Naptha's main ingredient is sodium tallowate or tallow which ... [Go to full review]
Jan 10, 2011
0%
TRUST
TRUST
- Unverified Purchaser
- Overrepresented word count (56 words)
- Contains repetitive phrases (show)
- Never-Verified Reviewer
- Single-Day Reviewer (posted all reviews on Jan 10, 2011)
- Brand Monogamist (2 of 2 reviews for this brand; avg rating: 1.0)
- Critical Reviewer (avg. rating: 1.0)
Analysis Details
Fail Deleted Reviews
We discovered a total of 54 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 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.
Fail Unverified Purchases
169 of the 32,902 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 3.6 while the verified purchasers have rated this product an average of 4.4. 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 Brand Repeats
Brand Monogamists
Less than approximately 10% of reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.
Fail Suspicious Reviewers
One-Hit Wonders
Less than approximately 10% 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.
Never-Verified Reviewers
Less than approximately 10% of reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.0 while the reviewers who have written at least one verified purchase review rated this product an average of 4.3. 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
Approximately 30% 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, it does not appear to have a significant impact on the overall rating.
Single-Day Reviewers
Less than approximately 10% of 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 1.0 while all other reviewers rated this product an average of 4.3. 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 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
~5% of reviews
(1.0/5)
(1.0/5)
~5% of reviews
(1.0/5)
(1.0/5)
~5% of reviews
(1.0/5)
(1.0/5)
~5% of reviews
(1.0/5)
(1.0/5)
~5% of reviews
(5.0/5)
(5.0/5)
~5% of reviews
(5.0/5)
(5.0/5)
~5% of reviews
(5.0/5)
(5.0/5)
~5% of reviews
(5.0/5)
(5.0/5)
Common Phrases in Titles:
~5% of reviews
(1.0/5)
(1.0/5)
Less than approximately 10% of reviews use substantial repetitive phrases between them. These reviewers have rated this product an average of 2.3 while reviews without substantial repetitive phrases rated this product an average of 4.3. 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 Rating Trend
It appears that several reviews were created during just a short period of time.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Warn Word Count Comparison
-
- ~35%
- 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 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that approximately 35% are within an overrepresented word count group. While this is more reviews from overrepresented word count groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.
Pass Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
<10% also reviewed:
Downton Abbey: Original UK Version Episode 7 by Hugh Bonneville
<10% also reviewed:
Pentel WOW! Retractable Ballpoint Pens, Medium... by Pentel
<10% also reviewed:
Crown Prince Brisling Sardines, 3.75 Ounce (Pack... by Crown Prince
<10% also reviewed:
Episode 1 by Ben Taylor
<10% also reviewed:
Echo Dot (2nd Generation) - Smart speaker with... by Amazon
<10% also reviewed:
Campbell’s Condensed Homestyle Chicken Noodle... by Campbell's
<10% also reviewed:
PBOX Bathtub Bubble Whale Bath Toy,Bubble Toy... by PBOX
Does not include products
from the same brand
from the same brand
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
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 Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
-
- <10%
- 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.