IMDB (which is a 10-star system) has a 'secret algorithm' that fiddles with the raw data to come up with a computed score. It's been suggested that some of the

IMDB (which is a 10-star system) has a 'secret algorithm' that fiddles with the raw data to come up with a computed score. It's been suggested that some of the factors involved include reduced weight for 1 and 10 star ratings (as well as the age of the user's account - votes from new accounts don't get as much weight, etc).