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Ina May's Guide to Breastfeeding: From the Nation's Leading Midwife
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From Ina May Gaskin
This report was last updated 10/25/2021.
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
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Report Card
Pass Overall Grade
FAIL Unverified Purchases
FAIL Suspicious Reviewers
FAIL Overlapping Review History
PASS Rating Trend
PASS Word Count Comparison
PASS Phrase Repetition
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
PASS Deleted Reviews
N/A Reviewer Participation
Most Trusted Reviews
The one I ordered came with a big inky fingerprint ... [Go to full review]
Dec 11, 2013
100%
TRUST
TRUST
- Verified Purchaser
- Take-Back Reviewer (3 deleted Reviews; avg. rating: 3.7)
- Critical Reviewer (avg. rating: 3.7)
Least Trusted Reviews
Ina May Gaskin's book has given me the knowledge and ... [Go to full review]
Oct 15, 2014
0%
TRUST
TRUST
- Unverified Purchaser
- One-Hit Wonder
- Never-Verified Reviewer
- Easy Grader (avg. rating: 5.0)
Analysis Details
Fail Unverified Purchases
24 of the 712 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 2.8 while the verified purchasers have rated this product an average of 4.7. 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.
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.
Fail Suspicious Reviewers
Never-Verified Reviewers
Less than approximately 10% of reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 2.5 while the reviewers who have written at least one verified purchase review rated this product an average of 4.6. 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.
Take-Back Reviewers
Approximately 40% of reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.8 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 4.4. 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.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
~20% also reviewed:
Ina May's Guide to Childbirth: Updated With... by Ina May Gaskin
<10% also reviewed:
The Vaccine Book: Making the Right Decision for... by Robert W. Sears MD
<10% also reviewed:
The Womanly Art of Breastfeeding: Completely... by Diane Wiessinger
<10% also reviewed:
Wherever You Are: My Love Will Find You by Tillman, Nancy
<10% also reviewed:
Birth Matters: A Midwife's Manifesta by Ina May Gaskin
<10% also reviewed:
Earth Mama Organic Perineal Balm, 2 fl. oz (60 ml) by Earth Mama
<10% also reviewed:
Business of Being Born, The [DVD] by Abby Epstein
Does not include products
from the same brand
from the same brand
Approximately 40% of reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.9 while the reviewers who have a more unique product review history rated this product an average of 4.3. 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.
Pass Rating Trend
-
- <10%
- Created on high-volume days
We didn't notice any signals that would indicate reviews were created unevenly over time.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Word Count Comparison
-
- ~25%
- 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 approximately 25% 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.
Pass Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Reviews:
Show MoreShow Less
~10% of reviews
(4.6/5)
(4.6/5)
~4% of reviews
(2.0/5)
(2.0/5)
~4% of reviews
(5.0/5)
(5.0/5)
~4% of reviews
(4.5/5)
(4.5/5)
~4% of reviews
(5.0/5)
(5.0/5)
~4% of reviews
(4.5/5)
(4.5/5)
Common Phrases in Titles:
~4% of reviews
(5.0/5)
(5.0/5)
Less than approximately 10% of reviews 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 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 4.2, while the average ease score for reviewers in this category is 4.3.
4.2 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
Less than approximately 10% of 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.
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.
-
- <10%
- 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
- 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.