title: Information-accumulation theory of speeded categorization.
abstract: A process model of perceptual categorization is presented, in which it is assumed that the earliest stages of categorization involve gradual accumulation of information about object features. The model provides a joint account of categorization choice proportions and response times by assuming that the probability that the information-accumulation process stops at a given time after stimulus presentation is a function of the stimulus information that has been acquired. The model provides an accurate account of categorization response times for integral-dimension stimuli and for separable-dimension stimuli, and it also explains effects of response deadlines and exemplar frequency.
authors.affiliation: Department of Psychology, University of Warwick, Coventry, United Kingdom. k.lamberts@warwick.ac.uk
authors.forename: K
authors.initials: K
authors.lastname: Lamberts
mesh_terms: D006801:Humans; D008960:Models, Psychological; D010465:Perception; D011582:Psychological Theory; D011930:Reaction Time