Early-Holistic Processing or Dimensional Similarity?
AbstractIn this commentary, we consider current evidence for the theory that multidimensional stimuli are initially processed as unanalyzed wholes. The theory appears unable to explain observers' behavior in various speeded and unspeeded tasks: (a) Perceivers can differentiate tiny changes made between confusable dimensions; (b) the fits of distance metrics to rating data appear to be largely under the control of optional processes; and (c) direct predictions from early-holistic models, as instantiated in the Euclidean hypothesis, are disconfirmed in tests using the rotation paradigm. In contrast, evidence has mounted to support the view that perception relies on a set of primary dimensions, processed within context-bound constraints. has been critical of our approach; we respond to each of her objections.