Google's "Bayesian" Averaging for Reviews

mborgelt · Feb 20, 2015

We have been spending some time studying Google's review metrics and know they use some sort weight system for reviews but I have never seen a company with a 5-star rating, even when they have all 5-star reviews until I looked at this business:

This business has one 4-star review and they are still pulling a 5-start aggregate ranking. Can anyone provide some insight as to what is going here? Thanks!

Linda Buquet · Feb 20, 2015

mborgelt said:
but I have never seen a company with a 5-star rating, even when they have all 5-star reviews

I have a 5 Star rating and all 5 Star reviews: https://plus.google.com/113358377118440631404/about

But I know that's rare. The only reason I do is because I don't think I have reviews anywhere else.
If I did it could water down my ratings.

I wonder if that company just has so many good reviews everywhere else that the one 4 star is not enough to bring their average down?

Colan Nielsen · Feb 21, 2015

There is a great post by Mike Blumenthal over at the LocalU blog that has some insight - Why does Google show a 4.8 rating when I have all 5-star reviews? - Local University

Mike also talks about the Bayesian Average.

Google's "Bayesian" Averaging for Reviews

mborgelt

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Linda Buquet

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Colan Nielsen

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