 Approval voting forces voters to think about the decision problem differently: They are asked to determine which candidates they approve of rather than selecting a single candidate to voter for or determining the relative ranking of the candidates. That is, the voters are asked which candidates are above a certain “threshold of acceptance”. Ranking a set of candidates and selecting the candidates that are approved are two different aspects of a voters overall opinion about the candidates. They are related but cannot be derived from each other. See Brams and Sanver 2009, for examples of voting methods that ask voters to both select a set of candidates that they approve and to (linearly) rank the candidates. 