I would separate the two interactions. Type 1 is like. Type 2 is dislike. They will have different correlations to different predicted interactions.
This is an ideal use case for multi-modal recommendation. Pat is working on bringing that into the DSL as we speak. On Mon, Jul 14, 2014 at 7:21 AM, Floris Devriendt <[email protected] > wrote: > Hey all, > > When using a discrete rating scale (e.g. likes / dislikes), what are the > things that I should consider when using Mahout for Collaborative > Filtering? > > If I'm not mistaking I've read a mail a week or two ago from this mailing > list stating that one should avoid using 0 (dislike) and 1 (like) as > scores, because Mahout would not be able to take into account the dislikes > properly. > If this is true, what scores should I give to my like/dislike scale? (e.g. > is -1/1 better than 0/1, or should I use 1/2 with 1 = dislike and 2 = > like?) > > Best regards, > Floris Devriendt >
