 There is some debate on whether approval voting incentivizes voters to express their evaluations of the alternatives truthfully. If the individuals’ underlying preferences are dichotomous (i.e., they each partition the alternatives into only two indifference classes, namely the preferred and the dispreferred alternatives), then approval voting is strategy-proof, and each voter has an incentive to vote for all and only his or her preferred alternatives (Brams and Fishburn 1978). However, if preferences aren’t dichotomous, then approval voting loses this property (Niemi 1984). The real-world strategic incentives under approval voting thus depend on the structure of the voters’ preferences.