How do Udemy calculate ratings?
I have my first 1 star.
When 1 person gives me a 5 star. I got a 5-star rating.
When 2 persons give 5 stars, I get 5-star rating.
Another comes along and give me a 1 star. And I get 2.83.
I just wonder where is the mathematic.
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Thanks for some answers. I guess that;s the game.
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@TimChui Udemy does not reveal the exact algorithm, because then Instructors can game the system accordingly. I know, most of us don't do that, but there are some Instructors who do buy or seed reviews and ratings, for their own Courses and their Competitors'.
The Rating is a weighted value based on how much the student has watched, whether or not they answered all the 6 parameters, or provided a comment etc. … among other things.
The algorithm also considers recency as an important parameter. Only Ratings in the last 90 days ratings or the last 50 ratings, whichever is more, are counted.
There were a few recent rating bugs, which were resolved. I have personally reported one more recent bug with the ratings of some of my Courses, which is pending resolution.3 -
There are more than a few recent bugs.
I have reported rating bugs for the last 3 years. Some have been resolved and some not. At one point a few months ago, in one night 60% of my ratings went down to zero, while the other 40% ended up at 5 stars. My overall rating went from 4.6% down to less than 2%. I reported this immediately. A week later, I finally received a response. It said, "yes, it looks like there might be a problem. We will look into it." It was another 3 weeks before it was corrected.
In the I.T. industry, that would be unacceptable. As an I.T. professional, what I see from my many years of experience in this arena, is a problem stemming from reduced staff to increase profits, and part of that staff is the support team. Udemy's Q,C. (testing) now seems minable, and their Q.A. (Quality Assurance) seems non-existent. As well, their regression testing on fixes and changes, part of the Q.C. standard, seems to have been eliminated.
This is a problem many I.T. departments are experiencing these days. Due to profit drops, mandates from senior decision makers, i.e. the C-Suite, are to "reduce staff." I.T. groups, now with less staff are being overwhelmed and being forced to work endless hours, resulting in an overall Quality loss. As an I.T. Management Consultant, I am seeing this on a daily basis. And, Udemy, from my observation, is in the same position.
And as a result, the course creators and instructors suffer.
Just my own evaluation, as I become more disappointed with Udemy on a daily basis.
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Yes, Udemy's Support has never been great, but after the recent layoffs, it's sunk to a new low.
Cant really blame a bunch of overworked Support Engineers, especially if they are new and have not been given a proper handover.
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