Information-accumulation theory of speeded categorization |
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Authors: | Lamberts K |
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Institution: | Department of Psychology, University of Warwick, Coventry, United Kingdom. k.lamberts@warwick.ac.uk |
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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. |
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