Karma, within the context of Less Wrong, is an integer value given to each member. A member is prevented from submitting articles to Less Wrong until they have obtained at least 20 karma. Members can vote on each other's posts and comments and the vote will either award 1 karma or subtract 1 karma from their score. It is no longer possible to vote on your own posts and comments.
The top contributors list visible on the main page is ranked according to karma. As of April 23, 2009, the top contributors are: