"I haven't devoted nearly enough time to figuring out the difference between four stars and five stars" I grappled with a similar issue a few months ago when I

"I haven't devoted nearly enough time to figuring out the difference between four stars and five stars" I grappled with a similar issue a few months ago when I wrote about the 5 star rating system used by Yelp. If time and mood are factors in evaluating a movie at a point in time (when the movie itself doesn't change over time) then the issue is muddled further when using a 5-star rating system for bar or restaurants where the same person can have wildly different empirical experiences in the same day. It seems to me that it's almost impossible to capture all the variables necessary to accurately capture and assess how you feel about something at a given point in time (movie/restaurant/whatever). Even if we could, would enough people want to go though the doubtless cumbersome and time consuming process of collection enough of the time to draw any meaningful conclusions?