Negative relevance judgements can only be very powerful if the things that you indicate you don't want are very close to the things you do want and are selected based on some evidence.
Uniformly selected negative relevance judgements have very close to zero value. On Thu, Feb 17, 2011 at 12:57 AM, Dinesh B Vadhia <[email protected] > wrote: > Not necessarily. Ordering breakfast by indicating all the things I don't > want to eat is "negative relevance feedback" and can be very powerful. > > > > From: Ted Dunning > Sent: Wednesday, February 16, 2011 11:27 PM > To: [email protected] > Cc: Lance Norskog > Subject: Re: Sparse data & Item Similarity > > > Actually, almost all implicit negative ratings are very close to useless. > > The analogy would be ordering breakfast in a diner by saying all the things > you don't want to eat to a waitress. The waitress will shortly yearn for a > positive rating. > > On Wed, Feb 16, 2011 at 9:28 PM, Lance Norskog <[email protected]> wrote: > > > If I was the business, I would analyze the "put in cart but did not > > buy" list. Negative ratings are just as useful as positive ratings. > > Possibly this gives a +1/-1 ternary value? > > > > On Wed, Feb 16, 2011 at 8:07 PM, Ted Dunning <[email protected]> > > wrote: > > > My experience is that there is a very small number of events that > > indicates real engagement. Using them in the form of Boolean preferences > > helps results. A lot. > > > > > > Using all of the other events that do not indicate engagement is a > total > > waste of resources because you are simply teaching the machine about > things > > you don't care about. > > > > > > Moreover there are probably some kinds of events that vastly outnumber > > others. Events that are less than 1% of your can matter bit often not. > > > > > > The valuable secret sauce you will gain is which events are which. > Which > > make your system sing and which ones just clog up the drains. > > > > > > Matthew wrote: > > > users can do.. "view", "add to cart", and "buy" which I've assigned > > > different preference values to. Perhaps it would be better to simply > > > use boolean yes/no in my case? > > > > > > > > > > > -- > > Lance Norskog > > [email protected] > > >
