Small screen detected. You are viewing the mobile version of SlideWiki. If you wish to edit slides you will need to use a larger device.
Simple case: no selection costs or other utility concerns that would differentially weight errors
Bayes’ Optimal Decision Rule
x is relevant iff p(R|x) > p(NR|x)
PRP in action: Rank all documents by p(R|x)
Using the PRP is optimal, in that it minimizes the loss (Bayes risk) under 1/0 loss
Provable if all probabilities correct, etc. [e.g., Ripley 1996]
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License