Jillian said

Tea Ratings not calculated properly in JS

A tea was rated 90/100 by 10 people. After rating it about 95, the rating went down to 87. When I refreshed the page, however, it went up to 91 (as it should have). Probably just a JavaScript calculation error.

4 Replies
Dustin said

I have been wondering how the top rated teas are figured. It seems odd that a tea with only 9 ratings would come in right behind one with 94. The other day I looked at it and the top were all shifted around from where they had been and later were back, similar to the error you saw.

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david said

The tea rating systems are confusing…

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Steepster uses a Bayesian Algorithm to determine aggregate ratings.

http://steepster.com/discuss/2149-somethings-wrong-with-the-rating-system

Jason is one of the Admins here and he explains it a little in the link above.

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Jillian said

That makes sense, but the rating still shouldn’t change after a person rates it vs when they refresh the page.

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