Tips that A+ students use to get ahead…
Posted by: Brian Armstrong in: Updates
Tutor ratings are one of the best features of UniversityTutor – they allow parents and students to quickly go through a large number of tutors and find the ones with the most experience.
However, the rating system was always somewhat basic and just used a simple average of all ratings to sort tutors.
In practice this led to some less-than-optimal results. For example….
To solve this I started investigating smarter ranking algorithms and eventually settled on this Bayesian rating system.
You can check out the details on that page, but the essence of it is that it you can become more confident about the rating when you have more votes. So a tutor with few ratings will have their average rating discounted slightly (toward the site wide average), whereas you don’t need to alter the value as much for a tutor with more votes.
As you can see it leads to better results and fixes the two problems mentioned above.
Hopefully the new rating system gives some better results.
Until next time, happy tutoring!
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