Brain Quest Grade 5, revised 4th edition: 1,500 Questions and Answers to Challenge the Mind
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From Chris Welles Feder
Refresh the report to view the most up-to-date data available:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Most Trusted Reviews
TRUST
- Verified Purchaser
- Take-Back Reviewer (16 deleted Reviews; avg. rating: 4.6)
- Overlapping Review History: reviewed 1 of 9 top products
- Easy Grader (avg. rating: 4.9)
Least Trusted Reviews
We couldn't find any low-quality reviewsAnalysis Details
We discovered a total of 12 deleted Reviews for this product, with an average rating of 4.9. 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.
Take-Back Reviewers
314 of the 691 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.
(4.9/5)
(4.8/5)
(4.6/5)
(4.7/5)
(4.3/5)
(4.7/5)
(4.9/5)
(4.9/5)
(4.8/5)
(4.9/5)
119 of the 691 total reviews for this product use substantial repetitive phrases between them. While this is more than we'd expect to see, it does not appear to have a significant impact on the overall rating.
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- 48%
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 332 reviewers (or 48%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.
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- 0%
- Created over 17 days
However, we see the following 17 days exceeding this threshold:
- 4 Reviews on Jan 1, 2013 (Avg. rating: 5.0)
- 4 Reviews on Jun 5, 2013 (Avg. rating: 5.0)
- 3 Reviews on Jan 13, 2013 (Avg. rating: 5.0)
- 3 Reviews on Dec 27, 2013 (Avg. rating: 5.0)
- 3 Reviews on Jun 28, 2014 (Avg. rating: 5.0)
- 3 Reviews on May 12, 2016 (Avg. rating: 5.0) Show All
Read more about our Rating Trend test.
34 of the 691 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.
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- 20%
- 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 139 reviews (or 20%) are within an overrepresented word count group. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
4% also reviewed:
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2% also reviewed:
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2% also reviewed:
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1% also reviewed:
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1% also reviewed:
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Nalgene Kids Grip-N-Gulp Water Bottles, Leak... by Nalgene
1% also reviewed:
Vulli Sophie la Girafe by Vulli
118 of the 691 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.
4.4 Product's Average Ease Score
4.4 Category's Average Ease Score
Read more about our Reviewer Ease test.
Brand Repeaters
148 of the 691 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.
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- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.