Difficulty, effort, and ability

This paper discusses two views of what makes an action difficult deriving from two very different approaches. On the first view, the difficulty of an action is determined by the (physical) effort involved in performing the action. On the second view, the difficulty of an action is determined by the level of ability required to perform the action. I develop and refine a version of each approach, including an original version of the ability approach drawing on recent work on agentive abilities. Then, I subject each, in turn, to a series of problem cases and consider how each view might be further refined to address these cases. I conclude that the ability approach is more promising than the effort approach because, among other reasons, it more aptly accounts for cases where difficulty seems to arise from factors other than effort (including counterproductive habits, lack of artistic imagination, and presence of pain).