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Netflix Prize article in Wired March 6, 2008

Posted by Andre Vellino in Collaborative filtering, Recommender.
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This item in Wired magazine on a new approach to winning the netflix prize made for interesting reading. The original slashdot post from a couple of days ago “Psychologist Beating Math Nerds in Race to Netflix Prize” made it sound like big news rather than merely an interesting development.

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1. Daniel Lemire - March 7, 2008

What I find most interesting about the Wired article is that it was written by an American math. prof. who gives out his gmail address.

Another interesting topic is… what is the limit on the accuracy? We all know there is a hard limit. You can never reach 100% accuracy. Not even close.

Intuitively, here is a way to estimate this limit: ask people to rate movies, then ask them again, say the next day. The difference in their own ratings will give you a measure of the fundamental uncertainty.

Alas, it is probably not a hard constant. It probably changes over time, and over different contexts, and over different user classes.

2. Anchoring effect in collaborative filtering - March 7, 2008

[…] Source: Andre Vellino. […]


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