Boolean recommendations makes the assumption that either negative feedback is really positive feedback (controversial, but works reasonably) or that negative feedback is not very useful (also controversial, but actually generally true).
If you really want to use negative information soundly, you need to use a much fancier algorithm. This can lead to huge costs in CPU and memory and it may or may not help you. More practical is to use boolean recommendations for the positive side and then just add a few heuristics for the negative side. Typical heuristics include: - don't show items that a user has negatively rated (obviously) - don't show items from a source that the user has rated negatively several times without rating other items from that source positively On Tue, Apr 27, 2010 at 10:27 AM, Tolga Oral <tolga.o...@gmail.com> wrote: > We are building a system on top of provided recommendations allowing user > to > provide feedback. I have a question on how to apply the negative feedback > for both boolean and none boolean scores. > > Assuming its a boolean item (item with no score), I cant see how we can > provide negative feedback for a given recommendation. Does this mean we > should convert our boolean items to a score of 1 and give score of -1 (or > 0) > for recommendations that user didnt like? > > This applies to items with score too I am not sure if the correct way of > going about this is to provide 0 or a negative value. > > Thank you. >
