Here is some details about how we calculate the average rating of an album and the rank of an album.
- Average rating: The classic calculation of the average but more weight is affected to the rating of collaborators and to rating with reviews.
- Rating only by members: Weight = 1
- Review by members : Weight = 5
- Rating or review by collaborators : Weight = 10
- Rank of an album*: We use a calculation that compare an album average rating and number of ratings over all others albums in the query using this theory (http://en.wikipedia.org/wiki/Weighted_average)
to create a variable every query "QWR" (AKA: Query Weighted Rating) use for ordering.
*By default, only albums with the average ratings above the average ratings of the requested query are displayed in theses lists, you can control this value in the parameters