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[Preferential Version] Rechargeable Car Jump Starter Charger, Pictek 3-in-1 (Portable Mobile Power...
More product info From Pictek

58% of potentially unnatural reviews removed (why?)
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Report Info:
Last Updated: Oct 26, 2016
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Note: While we've examined all 31 reviews, our reviewer analysis is based on a sample of 22 reviewers.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

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

Most Trusted Reviews

Oct 2, 2016      
100% TRUST
  • Verified Purchaser
  • One-Hit Wonder
  • Easy Grader (avg. rating: 5.0)


Least Trusted Reviews

I removed the battery out of my wife's 2004 Lexus ... [Go to full review]
Sep 17, 2016      
9% TRUST
  • Verified Purchaser
  • Contains repetitive phrases (show)
  • Critical Reviewer (avg. rating: 3.7)


Analysis Details

Fail 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 4.8, while the average ease score for reviewers in this category is 4.2. 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.

4.8 Product's Average Ease Score

4.2 Category's Average Ease Score


4.8
4.2


Read more about our Reviewer Ease test.


Warn Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.


16 of the 31 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is an excessively large percentage of incentivized reviews which may indicate unnatural reviews.

from incentivized reviews

from non-incentivized reviews


5.0
4.7


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 Brand Repeats

Brand Repeaters


13 of a random sample of 22 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


5.0
5.0


Read more about our Brand Repeats test.

Warn Phrase Repetition


19 of the 31 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


5.0
4.7


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


22 of a random sample of 22 reviewers have substantial overlapping product review history. This is an excessively large percentage which may indicate unnatural reviews.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


5.0
N/A


Read more about our Overlapping Review History test.

Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 31 reviews for this product over the span of 156 days, an average of 0.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.

Pass Unverified Purchases

14 of the 31 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.

from unverified purchasers

from verified purchases


5.0
4.8


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

  • 0%
  • 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.

Pass Suspicious Reviewers

One-Hit Wonders

We didn't detect a substantial amount of One Hit Wonders.

Never-Verified Reviewers

We didn't detect a substantial amount of Never-Verified Reviewers.

Take-Back Reviewers

We didn't detect a substantial amount of Take-Back Reviewers.

Single-Day Reviewers

We didn't detect a substantial amount of Single-Day Reviewers.

Pass Reviewer Participation

  • 27%
  • From reviewers with an overrepresented participation

We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 6 reviewers (or 27%) are within an overrepresented participation group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


5.0
5.0


Read more about our Reviewer Participation test.

Pass Deleted Reviews
  • 0
  • Reviews have been deleted
We have not discovered any deleted reviews for this product.

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.