how is "People who liked it also liked" calculated

Posted by avataryaminb last updated July 30, 2008 at 4:12 pm

I recently added a review for a netgear WG111T wireless adapter.

http://www.productwiki.com/netgear-wg111t/

It's not very good :P  But in the section "People who liked this, also liked" it lists a bunch of other products I reviewed.

 

I'm just curious how this calculated.  How does it know that I 'like' this product (which I don't :P...i just tagged it as 'have it'?

 

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