In this paper, I defend the view that we can literally perceive the morally right and wrong, or something near enough. In defending this claim, I will try to meet three primary objectives: to clarify how an investigation into moral phenomenology should proceed, to respond to a number of misconceptions and objections that are most frequently raised against the very idea of moral perception, and to provide a model for how some moral perception can be seen as literal perception. Because (...) I take “moral perception” to pick out a family of different experiences, I will limit myself to a discussion of the moral relevance of the emotions. (shrink)

We address the problem of predicting how people will spontaneously divide into groups a set of novel items. This is a process akin to perceptual organization. We therefore employ the simplicity principle from perceptual organization to propose a simplicity model of unconstrained spontaneous grouping. The simplicity model predicts that people would prefer the categories for a set of novel items that provide the simplest encoding of these items. Classification predictions are derived from the model without information either about the number (...) of categories sought or information about the distributional properties of the objects to be classified. These features of the simplicity model distinguish it from other models in unsupervised categorization (where, for example, the number of categories sought is determined via a free parameter), and we discuss how these computational differences are related to differences in modeling objectives. The predictions of the simplicity model are validated in four experiments. We also discuss the significance of simplicity in cognitive modeling more generally. (shrink)