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Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
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From Y. Daniel Liang
This report was last updated 3/20/2019.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in Introductory & Beginning with authentic reviews:
Report Card
Warn Overall Grade
FAIL
Suspicious Reviewers
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FAIL
Word Count Comparison
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WARN
Reviewer Participation
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PASS
Rating Trend
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PASS
Unverified Purchases
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PASS
Phrase Repetition
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PASS
Overlapping Review History
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PASS
Reviewer Ease
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PASS
Brand Repeats
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PASS
Incentivized Reviews
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PASS
Deleted Reviews
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Most Trusted Reviews
I had a copy of the 10th edition, and I ... [Go to full review]
Jun 5, 2017
90%
TRUST
TRUST
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Verified Purchaser
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Overrepresented Participation (posted 6 Reviews)
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Critical Reviewer (avg. rating: 3.5)
Least Trusted Reviews
A must for your computer scince curriculum [Go to full review]
Mar 19, 2019
10%
TRUST
TRUST
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Verified Purchaser
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Overrepresented word count (9 words)
Reviewer data not yet gathered.
Analysis Details
Fail
Suspicious Reviewers
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One-Hit Wonders
6 of the 23 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.
Take-Back Reviewers
3 of the 23 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.
Fail
Word Count Comparison
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- 74%
- 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 2 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 17 reviews (or 74%) are within an overrepresented word count group. These reviews have rated this product an average of 4.4, while all other reviews have rated this product an average of 2.7. 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
Reviewer Participation
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- 61%
- 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 14 reviewers (or 61%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass
Rating Trend
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- 0%
- Created on high-volume days
We counted 23 reviews for this product over the span of 652 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 2 or fewer reviews on any given day. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass
Unverified Purchases
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1 of the 23 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
Phrase Repetition
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Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Reviews:
2 reviews
(2.5/5)
(2.5/5)
2 reviews
(1.0/5)
(1.0/5)
2 reviews
(2.0/5)
(2.0/5)
1 of the 23 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.
Pass
Overlapping Review History
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Reviewers of this product have ALSO reviewed the following products:
9% also reviewed:
Old School Labs Ultimate 2 Stage Pre Workout for... by Old School Labs
2 of the 23 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
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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 3.9, while the average ease score for reviewers in this category is 4.3.
3.9 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass
Brand Repeats
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Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass
Incentivized Reviews
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On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
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- 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.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Pass
Deleted Reviews
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- 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:
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.