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Wella Shockwaves Volume Hairspray, 250 ml
More product info From WELLA

Amazon Reviews for  Wella Shockwaves Volume Hairspray, 250 ml
Rating:
120 Ratings
88 Reviews
("Ratings" vs. "Reviews")
28% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Jan 12, 2023
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Note: While Amazon.co.uk claims 120 Ratings, we counted 88 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

Warn Overall Grade
FAIL Deleted Reviews
FAIL Suspicious Reviewers
WARN Rating Trend
WARN Brand Repeats
WARN Word Count Comparison
WARN Phrase Repetition
WARN Overlapping Review History
PASS Unverified Purchases
PASS Reviewer Participation
PASS Reviewer Ease
PASS Incentivized Reviews

Most Trusted Reviews

4/5
Exactly as you would expect from Wella. Good quality and ... [Go to full review]
Aug 21, 2018      
100% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (9 deleted Reviews; avg. rating: 5.0)
  • Easy Grader (avg. rating: 4.4)


Least Trusted Reviews

Over the years I've used many different hairsprays, some good ... [Go to full review]
Apr 2, 2018      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (178 words)
  • Contains repetitive phrases (show)
  • Take-Back Reviewer (187 deleted Reviews; avg. rating: 4.9)
  • Brand Repeater (4 of 2271 reviews for this brand; avg rating: 4.5)
  • Overlapping Review History: reviewed 5 of 9 top products
  • Easy Grader (avg. rating: 4.8)


Analysis Details

Fail Deleted Reviews

We discovered a total of 11 deleted Reviews for this product, with an average rating of 4.8. 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:
  1. 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.
  2. We have no information on reviews that were never published in the first place.
  3. 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.
Read more about our Deleted Reviews test.

4.8 average rating of deleted reviews

4.8


Show distribution of deleted reviews

Fail Suspicious Reviewers

Take-Back Reviewers


77 of the 88 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


4.5
4.6


Read more about our Suspicious Reviewers test.

Warn Rating Trend

  • 35%
  • Created over 14 days

We counted 88 reviews for this product over the span of 3,349 days, an average of 0.0 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 1 or fewer reviews on any given day.

However, we see the following 14 days exceeding this threshold:In total, we found that 31 reviews were created on just 14 days. This is an excessively high number of reviews submitted on these high volume days.

from reviews created on high volume days

from reviews created on normal volume days


4.5
4.5


Read more about our Rating Trend test.

Warn Brand Repeats

Brand Repeaters


48 of the 88 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


4.5
4.5


Read more about our Brand Repeats test.

Warn Word Count Comparison

  • 66%
  • 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 3 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 58 reviews (or 66%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.5
4.5


Read more about our Word Count Comparison test.

Warn 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:
2 reviews
(5.0/5)
4 reviews
(4.3/5)
3 reviews
(4.0/5)
3 reviews
(4.3/5)
2 reviews
(4.0/5)
3 reviews
(4.3/5)
5 reviews
(4.8/5)
Show MoreShow Less


33 of the 88 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.6
4.4


Read more about our Phrase Repetition test.

Warn Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

Does not include products
from the same brand


55 of the 88 reviewers have substantial overlapping product review history. While this is more than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.5
4.5


Read more about our Overlapping Review History test.

Pass Unverified Purchases
  • 0%
  • Unverified Purchases
0 of the 88 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 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.

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 4.3, while the average ease score for reviewers in this category is 4.3.

4.3 Product's Average Ease Score

4.3 Category's Average Ease Score


4.3
4.3


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.

  • 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.