Hmmm. Whatever the scientific or theoretical improvement such an approach may offer having to educate users on how your ratings system works is going to add a huge amount of friction to user engagement.
And frankly who has ever mentally rated a film in terms of "re-watchableness".? People just think in terms of of "good" or "bad" and current ratings systems a la Amazon leverage that. It's simple, fast and given the histogram presentation tells me everything I need to know about the number and distribution of votes in a flash. Plus whether I want to rewatch a film or re-read a book is largely down to my mood at the time. But my opinion on whether it's "good" or "bad" is pretty static.
Maybe Amazon's system is not statistically bullet-proof, but who cares? We're talking movies here: a cheap, casual and discretionary purcahse.
And frankly who has ever mentally rated a film in terms of "re-watchableness".? People just think in terms of of "good" or "bad" and current ratings systems a la Amazon leverage that. It's simple, fast and given the histogram presentation tells me everything I need to know about the number and distribution of votes in a flash. Plus whether I want to rewatch a film or re-read a book is largely down to my mood at the time. But my opinion on whether it's "good" or "bad" is pretty static.
Maybe Amazon's system is not statistically bullet-proof, but who cares? We're talking movies here: a cheap, casual and discretionary purcahse.