Forum aggregation defines how all the ratings given to posts in a forum are combined to form the final grade (for each post and for the whole forum activity).
Choose from the following aggregation methods:
The mean of all the ratings given to posts in that forum.
The number of rated posts becomes the final grade. Note that the total cannot exceed the maximum grade allowed for the forum.
The highest rating is returned as the final grade.
The smallest rating is returned as the final grade.
All the ratings for a particular user are added together. Note that the total is not allowed to exceed the maximum grade for the forum.