title: Perceiving the present: systematization of illusions or illusion of systematization?
abstract: Mark Changizi et al. (2008) claim that it is possible systematically to organize more than 50 kinds of illusions in a 7 × 4 matrix of 28 classes. This systematization, they further maintain, can be explained by the operation of a single visual processing latency correction mechanism that they call "perceiving the present" (PTP). This brief report raises some concerns about the way a number of illusions are classified by the proposed systematization. It also poses two general problems-one empirical and one conceptual-for the PTP approach.
authors.affiliation: Department of Philosophy, Ohio University.
authors.forename: Robert E
authors.initials: RE
authors.lastname: Briscoe