This question already has an answer here:
- How is meta participation calculated? 3 answers
In any meta site for a Stack Exchange 2.0 site, there is a tab in the "users" page that shows the users basing on their participation. On the meta site for Drupal Answers, that page appears as in the following screenshot (I limited the screenshot to the first two lines).
To make a comparison, the voters tab reports the number of votes casted from users.
What are the criteria used to short the users in that page?
I recall the page showed more information for each user, which is not shown right now (I think it was the score the users got for their posts).