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Apple iPhone 6 64GB Unlocked GSM Smartphone - Space Gray (Certified Refurbished) From Apple Report Feedback

Warn Unnatural reviews possible

Original:

2,683 Reviews

Adjusted:

1,078 Reviews

17%
15%

View/Edit Adjustment
How is this calculated
Report Last Updated: Sep 10, 2017
Update Available
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Report Card

Click a test to jump to details

FAIL Suspicious Reviewers
FAIL Word Count Comparison
FAIL Skewed Helpfulness
WARN Rating Trend
WARN Reviewer Participation
PASS Unverified Purchases
PASS Phrase Repetition
PASS Overlapping Review History
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews
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Most Trusted Reviews

Phone received in very good condition, I'm using it right ... [Go to full review]
Jun 20, 2017      
100% TRUST
  • Verified Purchaser
  • Single-Day Reviewer (posted all reviews on Jun 20, 2017)
  • Easy Grader (avg. rating: 4.9)


Least Trusted Reviews

The screen has quit sensing touch at the bottom [Go to full review]
May 3, 2017      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (9 words)
  • One-Hit Wonder
  • Overrepresented Participation (posted 1 review)
  • Critical Reviewer (avg. rating: 3.0)


Analysis Details


Fail Suspicious Reviewers

One-Hit Wonders


969 of the 2,683 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.

from one-hit wonders

from reviewers with more than one review


3.0
3.5


Take-Back Reviewers


53 of the 2,683 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, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.

from take-back reviewers

from reviewers without previously deleted reviews


3.7
3.3


Single-Day Reviewers


619 of the 2,683 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 3.5 while all other reviewers rated this product an average of 3.3. 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.

from single-day reviewers

from non-single-day reviewers


3.5
3.3


Read more about our Suspicious Reviewers test.

Fail Word Count Comparison

  • 28%
  • 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 744 reviews (or 28%) are within an overrepresented word count group. These reviews have rated this product an average of 3.5, while all other reviews have rated this product an average of 3.3. 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.

from reviews with an overrepresented word count

from reviews with a properly represented word count


3.5
3.3


Read more about our Word Count Comparison test.

Fail Skewed Helpfulness
We examined the average net helpfulness score of negative reviews against the average net helpfulness score of positive reviews. The net helpfulness score is the number of times a review has been marked as helpful minus the number of times a review has been marked as unhelpful. We found that the negative reviews had an average net helpfulness score of -2.0 while the positive reviews had an average net helpfulness score of -0.3. Based on our statistical modeling, this discrepancy is significant enough to believe that the difference is not due to random chance, but possibly due to influence of unnatural voting patterns.

Example critical reviews

-0.3 average net helpfulness for positive reviews

-2.0 average net helpfulness for negative reviews


Read more about our Skewed Helpfulness test.


Warn Rating Trend

  • 25%
  • Created over 47 days

We counted 2,683 reviews for this product over the span of 745 days, an average of 3.6 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 11 or fewer reviews on any given day.

However, we see the following 47 days exceeding this threshold:In total, we found that 659 reviews were created on just 47 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


3.3
3.3


Read more about our Rating Trend test.

Warn Reviewer Participation

  • 78%
  • 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 2085 reviewers (or 78%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


3.2
3.8


Read more about our Reviewer Participation test.

Pass Unverified Purchases

130 of the 2,683 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


3.1
3.4


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 Phrase Repetition
  • 0%
  • Used substantial repetitive phrases
0 of the 2,683 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.
Read more about our Phrase Repetition test.

Pass Overlapping Review History
  • 0%
  • Substantial overlapping review history
0 of the 2,683 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.
Read more about our Overlapping Review History 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 3.6, while the average ease score for reviewers in this category is 4.1.

3.6 Product's Average Ease Score

4.1 Category's Average Ease Score


3.6
4.1


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


73 of the 2,683 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.

from Brand Repeaters

from Non-Repeaters


3.9
3.3


Read more about our Brand Repeats 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.


1 of the 2,683 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from incentivized reviews

from non-incentivized reviews


4.0
3.3


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.

Pass Deleted Reviews
  • 0
  • Reviews have been deleted
We have not discovered any deleted reviews for this product.
Read more about our Deleted Reviews test.