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Rock Band 3 added two new features: song ratings and recommendations. The song ratings, as far as I know, just change the likelihood of songs showing up. The recommendations, as far as I know, are the same for every user.

I was curious if RB3 uses these for collaborative filtering - in the same way that when you rate movies on Netflix it gives you different movie recommendations. Does anyone know if this is the case?

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up vote 5 down vote accepted

What it says in-game for the lighter ratings is:

  • 5 is twice as likely to appear in random setlists
  • 4 is 50% more likely to appear in random setlists
  • 3 standard (equivalent to no rating at all)
  • 2 is 50% less likely
  • 1 will not appear in a random setlist unless there is no other choice
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That's all well and good, I'm just curious if the ratings also affect song recommendations for the music store. – Daniel Lew Nov 9 '10 at 15:29
@daniel I am sure it does. The inline DLC recommendations (they appear as green shaded rows in the song selection screens) are new to RB3 and surely would build off the same system.. – Jeff Atwood Nov 9 '10 at 15:49
The inline recommendations may just be the same for everyone, or maybe they're based on previous purchases rather than ratings (ala Amazon). As a result I cannot draw a confident conclusion from the evidence thus far. – Daniel Lew Nov 9 '10 at 16:26

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